The constraint prevent sheets to overlap was broken because it relies on a check on the
user_id. The problem is that the latter uses an old-api function field
that is not recomputed yet at the time of the validation. The fix consists in
using a non-computed field instead.
This rev. is related to:
- 4fb9c8f0dc
- 6c78541978Closes#4217
opw-620175
ccb4e4332e