Missed block KES key

Hello all,

So we renovated the KES key and the next block we had to mint was missed with this error:

Invalid block 1aa764ed046a376bf5eadc8bc1191ccbd51847dd2671d791ed64cbffb30b7bb7 at slot 31212885: ExtValidationErrorHeader (HeaderProtocolError (HardForkValidationErrFromEra S (S (S (Z (WrapValidationErr {unwrapValidationErr = ChainTransitionError [OverlayFailure (OcertFailure (InvalidKesSignatureOCERT 240 211 29 "Reject"))

We’ve renovated the key again carefuly following step by step the CoinCashew guide and are hoping for the best now. Is there a way to verify if the block will be accepted beforehand? Without having to lose another block.

Thank you so much!