Ah, okay. Looking at it, I don’t even know why they include the delegation certificates at all if the delegation is not changed. … Sometimes, those guides give the impression that they just recorded some way that somehow worked for them, but didn’t cut it down to the required minimum.
Hmm, cardano-hw-cli themselves use --alonzo-era in https://github.com/vacuumlabs/cardano-hw-cli/blob/develop/docs/pool-registration.md.
I don’t have a pool, but I have done minting with cardano-hw-cli without giving an era at all in:
Sorry if it’s too much, but I always try to encourage to find out exactly what is needed and why.