phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2ef9a64ec33ef972f3f6399fceda85cc' 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 ('2ef9a64ec33ef972f3f6399fceda85cc', -1, 1767247772, 1767247772, 'd849d82e', 15, 0, 0)

Line : 187
File : sessions.php