The DELETE statement conflicted with the REFERENCE constraint "FK_LitespeedActivity_LitespeedDatabase (4374857)

The DELETE statement conflicted with the REFERENCE constraint "FK_LitespeedActivity_LitespeedDatabase

When the automatic job LiteSpeedCentral Activity cleanup job runs, it fails with the following error: 

The DELETE statement conflicted with the REFERENCE constraint "FK_LitespeedActivity_LitespeedDatabase". The conflict occurred in database "LiteSpeedCentral", table "dbo.LitespeedActivity". [SQLSTATE 23000] (Error 547) The statement has been terminated. [SQLSTATE 01000] (Error 3621).  The step failed.