fix: avoid mutating levels in header/body existence checks#10157

Merged

LukaszRozmej merged 1 commit intoNethermindEth:masterfrom

sashass1315:fix/blocktree-header-body

Jan 15, 2026

Commits on Jan 8, 2026

fix: avoid mutating levels in header/body existence checks
sashass1315
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