Angular Project Migration from 13 to 19 problem with "ng-flat-form"

I'm currently on version 14, and I fixed a few bugs that were there and I was able to run the application, however when I started migrating to Angular 15 I got these warnings and errors Package "ng-flat-form" has an incompatible peer dependency to "@angular/common" (requires "^12.1.2" (extended), would install "15.2.10"). Package "ng-flat-form" has an incompatible peer dependency to "@angular/core" (requires "^12.1.2" (extended), would install "15.2.10").

I tried to look for what I can use instead of ng-flat-form, but I couldn't find it and I have too many files with ng-flat-form, I would be very grateful if someone could help me.

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