Hello,

I cant edit some start - and finish dates:

The error message is not really helpful, what should I do? All other fields I can change.

OP Version 10.4.1 (yes, I'll upgrade next weekend)  with PostgreSQL 11 and Debian Buster.

Hello Gustav,

I think the error message explains why you can not edit the finish date. Most probably the two WP's concerned have children (with a closed status and thus not shown) with a finish date set.