How to restrict Editing the "Account" Field in Contact Records without coding

Hi everyone,

I'm looking for a way to prevent users from editing the "Account" Field in the Contact module. Ideally, i'd like to achieve this without custom coding.

I'm considering using a BPM Workflow to enforce this restriction. Is BPM the optimal solution for this use case ? If so, could you suggest the best approach to design the BPM process for this requirement ? 

Any insights, alternative solutions, or exemples would be greatly appriated ! :) 

Thanks in advance for your help.