form: change sql-table

hi

i have two tables in my database, which are almost equal in the structure. “pattern” and “concret”
you can save some kind of draft in the pattern table and for the concret table you can choose a pattern or insert something concret.

so i use two form apps to fill it: one for the pattern table, one for the concet tabe. the pattern form works pretty well.
because it is a huge form with lots of ajax stuff i want to copy the app, change the sql-table for the concret form app.

in both apps i use some select-fields which load data from a third table. after changing value of that select field the form should load data depending on that into another select.
works good for the patern-app. works good for the copy-of-pattern-app.
but than when i change the sql-table inside the copy-of-pattern-app, re-sync fields (select fields are not affected) the ajax - reload - stuff stopps working.

does someone know this issure? does someone know how to work it out?

Tip: clear the app folder after you change the sql / re-sync and then compile the app.