phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '5689d76d04e7ed2c01b3e61781f0dbac' 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 ('5689d76d04e7ed2c01b3e61781f0dbac', -1, 1771110418, 1771110418, 'd849d800', 2, 0, 0)

Line : 187
File : sessions.php