phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3ef70ffacbc8caca34bb4a4eb0bf15f6' 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 ('3ef70ffacbc8caca34bb4a4eb0bf15f6', -1, 1766970598, 1766970598, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php