Relation M2M between Security Groups and Security Groups raises an error

[SinergiaCRM]

Issue

When a realtion bwtween SecurityGroups (SGs) and SGs is created, you get a subpanel to select a SG from SG detail view. But when you select an existing group, an error appears and no relation is created.
Fatal error: Uncaught Error: Call to a member function addBean() on string in /application/suitecrm/data/Relationships/M2MRelationship.php:149 Stack trace: #0 /application/suitecrm/data/Link2.php(547): M2MRelationship->add() #1 /application/suitecrm/include/generic/Save2.php(200): Link2->add() #2 /application/suitecrm/include/MVC/Controller/SugarController.php(1084): require_once('/application/su...') #3 /application/suitecrm/include/MVC/Controller/SugarController.php(465): SugarController->handleActionMaps() #4 /application/suitecrm/include/MVC/Controller/SugarController.php(361): SugarController->process() #5 /application/suitecrm/include/MVC/SugarApplication.php(101): SugarController->execute() #6 /application/suitecrm/index.php(54): SugarApplication->execute() #7 {main} thrown in /application/suitecrm/data/Relationships/M2MRelationship.php on line 149

Possible Fix

No response

Steps to Reproduce the Issue

1.Create a M2M relation between Security Groups and Security Groups
2.Create a new Security group
3.From the "Security Suite Management" subpanel select another existing security group

Context

No response

Version

7.14.4

What browser are you currently using?

Chrome

Browser Version

No response

Environment Information

MAriaDB, PHP 7.4

Operating System and Version

Debian