phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '55a1569a798b2cdb9ac35777e8801ee5' 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 ('55a1569a798b2cdb9ac35777e8801ee5', -1, 1770457414, 1770457414, 'd849d898', 7, 0, 0)

Line : 187
File : sessions.php