The ability to change the initial value of generator/sequence was added.

[DmEye]

You need to write "ALTER GENERATOR gen_name START WITH some_integer;" if you want to change namly the initial value of generator/sequence.

[asfernandes]

We have create or alter sequence <name> start with <n> already acting very different than alter sequence <name> start with <n> that you are creating, i.e., when sequence exists is works like alter sequence <name> restart with <n>.

This is not feeling right. I think more discussion is needed for this command.