Not able to change the employment start date of an employee

Summary:

Content (required):

Hi Expert,

There is an employee for that client who wants to update the hire date of an employee and they are getting below error.

Error Message: You can't select this date as assignment having number E4663 is used in manager relationship. Remove the relationship or select a date that's before 18-Apr-2022.

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

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