I would like to creat a logical button to change some informations from other table. I created a fixed field, an empty field and a logical button to show the empty filed so i can change the information, but that is what happen:

This is my OPORT Table, where I fill all the informations, with the original field, the fixed and the logical:

This is my OPREG table, where i put other informations based on OPORT table, so i have a FK to OPORT:

In the application, i have a form for OPORT, so here is where I fill the fields and I used the DESCRI field to example what I want:

In the OPREG form, with the informations from OPORT, I have the fields filled, and the button to change the information if necessary:

I click to change information:

But when i click back, the original information returns:

As I understand it, I can't change fields from another table, but how can I do this, if I need to change some of those fields?