phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6ef4e848d7c27d42b2a89f0117600c69' 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 ('6ef4e848d7c27d42b2a89f0117600c69', -1, 1767099015, 1767099015, 'd849d819', 14, 0, 0)

Line : 187
File : sessions.php