phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7e1b7ed7ecb0b4a5a8ec65d02ee1c1ad' 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 ('7e1b7ed7ecb0b4a5a8ec65d02ee1c1ad', -1, 1768037001, 1768037001, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php