phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6d55a8144ea84d55d89c65fa6c352a33' 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 ('6d55a8144ea84d55d89c65fa6c352a33', -1, 1771181110, 1771181110, 'd849d800', -4, 0, 0)

Line : 187
File : sessions.php