diff --git a/Cargo.toml b/Cargo.toml
index 47940df..cef4c68 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -74,6 +74,3 @@ log-info = []
 log-debug = []
 log-warn = []
 log-error = []
-
-# Support for large ECC keys (brainpool 512 and NIST P521), that do not have functional import/export
-large-ecc = []
diff --git a/src/lib.rs b/src/lib.rs
index 360d8af..6434585 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -42,7 +42,7 @@ const BACKEND_DIR: &Path = path!("se050-bak");
 pub const GLOBAL_ATTEST_ID: ObjectId = ObjectId(hex!("F0000012"));
 
 /// The version to know wether it should be re-configured
-pub const SE050_CONFIGURE_VERSION: u32 = 3;
+pub const SE050_CONFIGURE_VERSION: u32 = 2;
 
 pub enum Se05xLocation {
     Persistent,
@@ -199,17 +199,6 @@ mod tests {
     fn backend_version() {
         // History of previous SE050_CONFIGURE_VERSION and the curves they used
         let curves_versions: &[(u32, &[_])] = &[
-            (
-                3,
-                &[
-                    PRIME256V1_INITIALIZER,
-                    SECP384R1_INITIALIZER,
-                    SECP521R1_INITIALIZER,
-                    BRAINPOOL_P256R1_INITIALIZER,
-                    BRAINPOOL_P384R1_INITIALIZER,
-                    BRAINPOOL_P512R1_INITIALIZER,
-                ],
-            ),
             (
                 2,
                 &[
@@ -218,6 +207,7 @@ mod tests {
                     SECP521R1_INITIALIZER,
                     BRAINPOOL_P256R1_INITIALIZER,
                     BRAINPOOL_P384R1_INITIALIZER,
+                    BRAINPOOL_P512R1_INITIALIZER,
                 ],
             ),
             (1, &[PRIME256V1_INITIALIZER, SECP521R1_INITIALIZER]),