Hello all, I've been trying to upgrade my koha 18.11 to version 22.11. When i run the comand koha-upgrade-schema to upgrade the database schema i am getting this error: " UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Can't create table `koha_dgadr`.`illrequests` (errno: 150 "Foreign key constraint is incorrectly formed") at /usr/share/perl5/DBIx/Class/Schema.pm line 1118 " This is happening on 18.12.00.016 step list in da script updatedatabase.pl (line17406) Corresponding to this line of code, in my case the illrequests_safk doesnt existe before running the script: if ( !foreign_key_exists( 'illrequests', 'illrequests_safk' ) ) { $dbh->do( "ALTER TABLE illrequests ADD CONSTRAINT illrequests_safk FOREIGN KEY (status_alias) REFERENCES authorised_values(authorised_value) ON UPDATE CASCADE ON DELETE SET NULL" ); } I do have some equal values for the column authorised_value on the table authorised_value and i think its probably the reason it cant create the foreign key on the table illrequests, Is there a way to correct this? Yours sincerely, Paulo Neto