phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3c707df9d94a08b277a2c0a81bae8ba5' 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 ('3c707df9d94a08b277a2c0a81bae8ba5', -1, 1771249277, 1771249277, 'd849d800', -4, 0, 0)

Line : 187
File : sessions.php