Subject Re: [firebird-support] invalid request BLR at offset 27, on restore FB 3 database to 2.5
Author Dimitry Sibiryakov
12.06.2019 12:26, 'Mr. John' mr_johnmr@... [firebird-support] wrote:
> based application is written for 2.5,just some test are done for Fb 3,in case something
> goes wrong, must go back to 2.5 until a fix is done,so that restore is need.

That's a wrong way of migration.
Better set up bi-directional replication between old server and new one. In this case
you can switch back in no time without data being lost.