What’s happening, is that Business Central sometimes want to do find transfer by it self, if it sees the same field number present in certain cases. What you want, it to either align so files have the same number, or misalign, so fields do not have the same number.
To do that, go to the “Create New Fields…” list in the the Simple Object Designer. Use Personalization to bring the Field No. field to the list.
Now you can see that Special Contract Notes in Customer table and Contact in BW Area Table have the same number, but they have different types because they’re not the “same” field.
Give one of them a new field number, and everything should work and you publish your app.