Unable modify People Group (key flexfield) EL Expression in Page Composer

Summary:

We are trying to make People Group field editable to certain user roles in Edit Pending Worker using Page Composer but unable to modify the EL Expression.

Content (required):

We have an existing EL Expression for this field but when we change it to the new EL expression, it still reflects the old one,

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):

We want to change from #{securityContext.userInRole['Role1'] to #{!securityContext.userInRole['Role2, Role3, Role4'].

However, when we apply the EL expression, the old code is still there.