Can't make changes to a function in a postgreSQL database with Heidi Version 11.2.0.6213

Trying to change the name of a table in a function and getting this:

This is no the first time, I'm getting this error. I needed to go back to pgAdmin to make some changes to a table as well.

Yes, the routine editor is only fully functional in MySQL/MariaDB mode. I should probably better disable it on other systems.

OK, good idea