Are you still having issues with this?
I was wondering, you mention you want to change the Relate Type field
But in which way?
Do you just want to be able to select your Custom Module via the “Related to” field on Meetings?
If so, you should just be able to edit the “parent_type_display” dropdown list.
So, I have a custom module called “Submission Accounts”:
The Module Identifier is as so:
I have added my Custom Module to the “parent_type_display” List:
(Item Name will be the Module Identifier, with module prefix / Display Label will simply be how you wish for this to be displayed in the dropdown)
Allowing me to select it on the Meetings Module:
Unless there is something else you’d like to see?