phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6fbf4122cd84143a8e2f6dd2aa45142c' 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 ('6fbf4122cd84143a8e2f6dd2aa45142c', -1, 1770020918, 1770020918, 'd849d837', 14, 0, 0)

Line : 187
File : sessions.php