TrimmingWouldExceedMaxImmunePercentage

A chain-side capacity limit was hit; reduce the size or count of the request

Trimming the subnet's UIDs cannot proceed because immune neurons would make up at least the maximum immune share (80%) of the reduced slot count. Check neurons still in ImmunityPeriod and retry after their immunity lapses or with a higher max UID target.

Declared by the SubtensorModule pallet; it classifies to the semantic code limit_exceeded.

Remediation

A chain-side capacity limit was hit; reduce the size or count of the request

The same explanation is available in the terminal: btcli explain TrimmingWouldExceedMaxImmunePercentage.