diff --git a/.gitignore b/.gitignore
index f7648bc0d..35b1eceb9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ yarn-error.log
 /.vscode
 /.docker
 .DS_Store
+config/app.php
diff --git a/app/Livewire/Conducting/FileUpload.php b/app/Livewire/Conducting/FileUpload.php
index 90e0a9c78..bd1ebc7a7 100644
--- a/app/Livewire/Conducting/FileUpload.php
+++ b/app/Livewire/Conducting/FileUpload.php
@@ -22,12 +22,14 @@
 
 use App\Utils\CheckProjectDataPlanning;
 use App\Traits\ProjectPermissions;
+use App\Traits\LivewireExceptionHandler;
 
 class FileUpload extends Component
 {
 
     use ProjectPermissions;
     use WithFileUploads;
+    use LivewireExceptionHandler;
 
     private $translationPath = 'project/conducting.import-studies.livewire';
     private $toastMessages = 'project/conducting.import-studies.livewire.toasts';
@@ -192,11 +194,13 @@ public function save()
                     $errorMessage = $e->getMessage();
                     FacadesLog::error('Erro ao salvar o arquivo ou processar BibUpload.', ['error' => $errorMessage]);
 
-                    $toastMessage = __($this->toastMessages . '.file_upload_error', ['message' => $errorMessage]);
-                    $this->toast(
-                        message: $toastMessage,
-                        type: 'error'
-                    );
+                    // Deleta o bibUpload se houver erro
+                    if (isset($bibUpload) && $bibUpload->exists()) {
+                        $bibUpload->delete();
+                        FacadesLog::info('Registro BibUpload deletado após falha no processamento.', ['id_bib' => $bibUpload->id_bib]);
+                    }
+
+                    $this->handleException($e);
                 }
 
             } else {
@@ -214,11 +218,7 @@ public function save()
             $errorMessage = $e->getMessage();
             FacadesLog::error('Erro geral ao tentar salvar o arquivo.', ['error' => $errorMessage]);
 
-            $toastMessage = __($this->toastMessages . '.file_upload_error', ['message' => $errorMessage]);
-            $this->toast(
-                message: $toastMessage,
-                type: 'error'
-            );
+            $this->handleException($e);
         }
     }
 
@@ -262,15 +262,15 @@ private function mapCsvFields($csvRow)
         return [
             'type' => $csvRow['Content Type'] ?? '',
             'citation-key' => '',
-            'title' => $csvRow['Item Title'] ?? '',
-            'author' => $csvRow['Authors'] ?? '',
+            'title' => !empty($csvRow['Item Title']) ? $csvRow['Item Title'] : null,
+            'author' =>!empty($csvRow['Authors']) ? $csvRow['Authors'] : null,
             'booktitle' => $csvRow['Book Series Title'] ?? '',
             'volume' => $csvRow['Journal Volume'] ?? '',
             'pages' => '',
             'numpages' => '',
             'abstract' => '',
             'keywords' => '',
-            'doi' => $csvRow['Item DOI'] ?? '',
+            'doi' => !empty($csvRow['Item DOI']) ? $csvRow['Item DOI'] : null,
             'journal' => $csvRow['Publication Title'] ?? '',
             'issn' => '',
             'location' => '',
@@ -288,7 +288,7 @@ public function deleteFile($id)
         if (!$this->checkEditPermission($this->toastMessages . '.denied')) {
             return;
         }
-        
+
         $file = BibUpload::findOrFail($id);
 
         try {
diff --git a/app/Livewire/Planning/Criteria/Criteria.php b/app/Livewire/Planning/Criteria/Criteria.php
index 1cdea523e..2e2cc3e6f 100644
--- a/app/Livewire/Planning/Criteria/Criteria.php
+++ b/app/Livewire/Planning/Criteria/Criteria.php
@@ -9,11 +9,13 @@
 use App\Utils\ActivityLogHelper as Log;
 use App\Utils\ToastHelper;
 use App\Traits\ProjectPermissions;
+use App\Traits\LivewireExceptionHandler;
 
 class Criteria extends Component
 {
 
     use ProjectPermissions;
+    use LivewireExceptionHandler;
 
     private $toastMessages = 'project/planning.criteria.livewire.toasts';
 
@@ -46,8 +48,7 @@ protected function rules()
             'currentProject' => 'required',
             'criteriaId' => 'required|string|max:20|regex:/^[a-zA-Z0-9]+$/',
             'description' => 'required|string|max:255',
-            'type' => 'required|array',
-            'type.*.value' => 'string'
+            'type.value' => 'required|in:Inclusion,Exclusion'
         ];
     }
 
@@ -63,7 +64,8 @@ protected function messages()
             'description.required' => __($tpath . '.description.required'),
             'criteriaId.required' => __($tpath . '.criteriaId.required'),
             'criteriaId.regex' => __($tpath . '.criteriaId.regex'),
-            'type.required' => __($tpath . '.type.required'),
+            'type.value.required' => __($tpath . '.type.required'),
+            'type.value.in' => __($tpath . '.type.in'),
         ];
     }
 
@@ -88,7 +90,7 @@ public function mount()
             'id_project',
             $this->currentProject->id_project
         )->where('type', 'Exclusion')->first()->rule ?? 'ANY';
-        $this->type['value'] = 'NONE';
+        $this->type['value'] = null;
     }
 
     /**
@@ -96,8 +98,8 @@ public function mount()
      */
     public function resetFields()
     {
-        $this->criteriaId = '';
-        $this->description = '';
+        $this->criteriaId = null;
+        $this->description = null;
         $this->type['value'] = null;
         $this->currentCriteria = null;
         $this->form['isEditing'] = false;
@@ -253,14 +255,6 @@ public function submit()
 
         $this->validate();
 
-        if (strcmp($this->type['value'], 'NONE') === 0) {
-            $this->toast(
-                message: $this->translate('type.required'),
-                type: 'info'
-            );
-            return;
-        }
-
         $updateIf = [
             'id_criteria' => $this->currentCriteria?->id_criteria,
         ];
@@ -311,10 +305,7 @@ public function submit()
                 type: 'success'
             );
         } catch (\Exception $e) {
-            $this->toast(
-                message: $e->getMessage(),
-                type: 'error'
-            );
+            $this->handleException($e);
         } finally {
             $this->resetFields();
         }
diff --git a/app/Models/BibUpload.php b/app/Models/BibUpload.php
index 4e30332a7..93265ab23 100644
--- a/app/Models/BibUpload.php
+++ b/app/Models/BibUpload.php
@@ -44,22 +44,22 @@ public function importPapers(array $papers, $database, int $id_project, int $id_
                 'id_bib' => $id_bib,
                 'type' => $p['type'] ?? '',
                 'bib_key' => $p['citation-key'] ?? '',
-                'title' => $p['title'] ?? '',
-                'author' => $p['author'] ?? '',
-                'book_title' => $p['booktitle'] ?? null,
-                'volume' => $p['volume'] ?? null,
-                'pages' => $p['pages'] ?? null,
-                'num_pages' => $p['numpages'] ?? null,
-                'abstract' => $p['abstract'] ?? null,
-                'keywords' => $p['keywords'] ?? null,
-                'doi' => $p['doi'] ?? '',
+                'title' => $p['title'] ?? null,
+                'author' => $p['author'] ?? null,
+                'book_title' => $p['booktitle'] ?? '',
+                'volume' => $p['volume'] ?? '',
+                'pages' => $p['pages'] ?? '',
+                'num_pages' => $p['numpages'] ?? '',
+                'abstract' => $p['abstract'] ?? '',
+                'keywords' => $p['keywords'] ?? '',
+                'doi' => $p['doi'] ?? null,
                 'journal' => $p['journal'] ?? '',
-                'issn' => $p['issn'] ?? null,
-                'location' =>$p['location'] ?? null,
-                'isbn' => $p['isbn'] ?? null,
-                'address' =>$p['address'] ?? null,
+                'issn' => $p['issn'] ?? '',
+                'location' =>$p['location'] ?? '',
+                'isbn' => $p['isbn'] ?? '',
+                'address' =>$p['address'] ?? '',
                 'url' => $p['url'] ?? '',
-                'publisher' => $p['series'] ?? null,
+                'publisher' => $p['publisher'] ?? '',
                 'year' => $p['year'] ?? '',
                 'score' => 0,
                 'status_qa' => 3,
diff --git a/app/Traits/LivewireExceptionHandler.php b/app/Traits/LivewireExceptionHandler.php
new file mode 100644
index 000000000..a3c574314
--- /dev/null
+++ b/app/Traits/LivewireExceptionHandler.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Traits;
+
+use Exception;
+use Illuminate\Database\QueryException;
+use Illuminate\Validation\ValidationException;
+
+trait LivewireExceptionHandler
+{
+    /**
+     * Handle exceptions and display appropriate error messages.
+     * @param \Exception $e
+     * @return void
+     */
+    public function handleException(Exception $e): void
+    {
+        /**
+         * ----------------------------------------------------------------
+         * Query Exceptions
+         * ----------------------------------------------------------------
+         */
+        if ($e instanceof QueryException) {
+            $errorCode = $e->errorInfo[1] ?? null; // https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-reference.html
+
+            switch ($errorCode){
+                case 1048:
+                    $column = $this->extractColumnFromMessage($e->getMessage());
+                    $this->toast(
+                        message: $column
+                            ? __("errors.database.column_cannot_be_null", ['column' => $column])
+                            : __("errors.database.missing_required_field"),
+                        type: 'error'
+                    );
+                    break;
+
+                default:
+                    $this->toast(
+                        message: __('errors.database.generic'),
+                        type: 'error'
+                    );
+            }
+            return;
+        }
+        // ----------------------------------------------------------------
+
+        /**
+         * ----------------------------------------------------------------
+         * Validation Exceptions
+         * ----------------------------------------------------------------
+         */
+        if ($e instanceof ValidationException) {
+            $errors = $e->validator->errors()->all();
+            $this->toast(
+                message: implode(' ', $errors),
+                type: 'error'
+            );
+            return;
+        }
+        // ----------------------------------------------------------------
+
+        $this->toast(
+            message: __('errors.generic'),
+            type: 'error'
+        );
+    }
+
+    /**
+     * Extract the column name from the error message.
+     * @param string $message
+     * @return string|null
+     */
+    protected function extractColumnFromMessage(string $message): ?string
+    {
+        if (preg_match("/Column '(.+?)' cannot be null/", $message, $matches)) {
+            return $matches[1];
+        }
+
+        return null;
+    }
+}
diff --git a/lang/en/errors.php b/lang/en/errors.php
new file mode 100644
index 000000000..14de367f1
--- /dev/null
+++ b/lang/en/errors.php
@@ -0,0 +1,10 @@
+<?php
+
+return [
+    'generic' => 'Something went wrong. Please try again or contact support.',
+    'database' => [
+        'generic' => 'There was a problem with the database. Please try again.',
+        'column_cannot_be_null' => "The ':column' field cannot be null.",
+        'missing_required_field' => 'A required field was not filled in.',
+    ],
+];
diff --git a/lang/en/project/conducting.php b/lang/en/project/conducting.php
index a39ae0ee6..f2c177c17 100644
--- a/lang/en/project/conducting.php
+++ b/lang/en/project/conducting.php
@@ -471,7 +471,21 @@
              <ul>
              <li><b>Note:</b> If you want to conduct <b>"Peer Review"</b>, it is necessary to invite the researchers and add them to the project before importing the studies (papers).</li>
              <li>To add researchers, navigate to <b>"My Projects->Team"</b></li>
-             </ul>'
+             </ul>
+             <br>
+             <b>CSV Format Guidelines:</b><br>
+             Your CSV file must include the following column headers:<br>
+             <ul>
+                 <li>"<b>Item Title</b>" – used as the paper title</li>
+                 <li>"<b>Authors</b>" – list of authors</li>
+                 <li>"<b>Item DOI</b>" – Digital Object Identifier</li>
+                 <li>"URL" – link to the paper</li>
+                 <li>"Publication Year" –  publication year</li>
+                 <li>"Book Series Title" – optional book series name</li>
+                 <li>"Journal Volume" – optional journal volume</li>
+                 <li>"Publication Title" – optional journal or publication name</li>
+             </ul>
+             <b>Important:</b> If any of the fields in <b>bold</b> are missing or empty, the import will <b>not</b> occur.'
         ],
         'table' => [
             'database' => 'Database',
diff --git a/lang/en/project/planning.php b/lang/en/project/planning.php
index 2506b264c..b0cc0847d 100644
--- a/lang/en/project/planning.php
+++ b/lang/en/project/planning.php
@@ -527,6 +527,7 @@
             ],
             'type' => [
                 'required' => 'The type field is required.',
+                'in' => 'Select a valid type.'
             ],
             'logs' => [
                 'added' => 'Criteria added',
diff --git a/lang/pt_BR/errors.php b/lang/pt_BR/errors.php
new file mode 100644
index 000000000..6cd9393b9
--- /dev/null
+++ b/lang/pt_BR/errors.php
@@ -0,0 +1,10 @@
+<?php
+
+return [
+    'generic' => 'Algo deu errado. Tente novamente ou entre em contato com o suporte.',
+    'database' => [
+        'generic' => 'Problemas com o banco de dados. Tente novamente.',
+        'column_cannot_be_null' => "O campo ':column' não pode ser nulo.",
+        'missing_required_field' => 'Um campo obrigatório não foi preenchido.',
+    ],
+];
diff --git a/lang/pt_BR/project/conducting.php b/lang/pt_BR/project/conducting.php
index afe5f78fd..67bd99e18 100644
--- a/lang/pt_BR/project/conducting.php
+++ b/lang/pt_BR/project/conducting.php
@@ -297,7 +297,21 @@
                      <ul>
                      <li><b>Obs.:</b> Se você deseja realizar <b>"Avaliação por Pares"</b>, é necessário convidar os pesquisadores  e adicionar ao projeto antes de importar os estudos (papers)</li>
                      <li>Para adicionar pesquisadores, navegue até <b>"Meus Projetos->Colaboradores"</b></li>
-                     </ul>'
+                     </ul>
+                     <br>
+                     <b>Orientações para o formato CSV:</b><br>
+                     O arquivo CSV deve conter os seguintes cabeçalhos de coluna:<br>
+                     <ul>
+                         <li>"<b>Item Title</b>" – usado como o título do estudo</li>
+                         <li>"<b>Authors</b>" – lista de autores</li>
+                         <li>"<b>Item DOI</b>" – identificador digital do objeto</li>
+                         <li>"URL" – link opcional para o estudo</li>
+                         <li>"Publication Year" – ano de publicação</li>
+                         <li>"Book Series Title" – nome da série de livros</li>
+                         <li>"Journal Volume" – volume do periódico</li>
+                         <li>"Publication Title" – nome do periódico ou publicação</li>
+                     </ul>
+                     <b>Atenção:</b> Se algum dos campos em <b>negrito</b> estiver ausente ou vazio, a importação <b>não será realizada</b>.'
         ],
         'table' => [
             'database' => 'Base de dados',
diff --git a/lang/pt_BR/project/planning.php b/lang/pt_BR/project/planning.php
index 8238e9138..e4d709ef2 100644
--- a/lang/pt_BR/project/planning.php
+++ b/lang/pt_BR/project/planning.php
@@ -527,6 +527,7 @@
             ],
             'type' => [
                 'required' => 'Selecionar um tipo é obrigatório.',
+                'in' => 'Selecione um tipo válido.',
             ],
             'logs' => [
                 'added' => 'Critério adicionado',
diff --git a/resources/views/livewire/planning/criteria/criteria.blade.php b/resources/views/livewire/planning/criteria/criteria.blade.php
index d82c558ec..298b90f9f 100644
--- a/resources/views/livewire/planning/criteria/criteria.blade.php
+++ b/resources/views/livewire/planning/criteria/criteria.blade.php
@@ -21,9 +21,9 @@
                             required
                         />
                         @error("criteriaId")
-                        <span class="text-xs text-danger">
-                {{ $message }}
-            </span>
+                            <span class="text-xs text-danger">
+                                {{ $message }}
+                            </span>
                         @enderror
                     </div>
 
@@ -37,9 +37,9 @@
                             required
                         />
                         @error("description")
-                        <span class="text-xs text-danger">
-                {{ $message }}
-            </span>
+                            <span class="text-xs text-danger">
+                                {{ $message }}
+                            </span>
                         @enderror
                     </div>
                 </div>
@@ -67,6 +67,11 @@
                             {{ __("project/planning.criteria.form.select-exclusion") }}
                         </option>
                     </x-select>
+                    @error("type.value")
+                        <span class="text-xs text-danger">
+                            {{ $message }}
+                        </span>
+                    @enderror
                 </div>
                 <div>
                     <x-helpers.submit-button