phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f1a6bae16e34eaaa3150c1762c5a1bc8' 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 ('f1a6bae16e34eaaa3150c1762c5a1bc8', -1, 1768041831, 1768041831, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php