fix: Set correct sequences converting MySQL to PostgreSQL

[rustyscottweber]

Fixes the bug:56128 #56128

While migrating to PostgreSQL users suffer an issue where the sequence variables aren't set.

After making this fix, the sequences are set correctly and migration succeeds.

[solracsf]

Thanks for your PR. 👍

Can you please fix both DCO and commit message?
https://www.conventionalcommits.org/en/v1.0.0/#examples

[rustyscottweber]

Thanks for your PR. 👍

Can you please fix both DCO and commit message? https://www.conventionalcommits.org/en/v1.0.0/#examples

Forgive my ignorance, but what does DCO mean? I am unfamiliar with this parlance.
Is there anything else in the commit message that needs fixing?

[solracsf]

Basically all commits need to be signed with signed-off-by: your name <your email address>.

git commit -s already does this for you.