phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6f8e3efc1d77791e95458aa020d781c6' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6f8e3efc1d77791e95458aa020d781c6', -1, 1771349356, 1771349356, 'd849d885', 4, 0, 0)

Line : 187
File : sessions.php