phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8b6ac2eebd591b5ba267c3b0afa9865e' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8b6ac2eebd591b5ba267c3b0afa9865e', -1, 1766661908, 1766661908, 'd849d82e', -4, 0, 0)

Line : 187
File : sessions.php