phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f6761a60edf78c09606a4a9d91bbd87b' 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 ('f6761a60edf78c09606a4a9d91bbd87b', -1, 1770394891, 1770394891, 'd849d89c', -9, 0, 0)

Line : 187
File : sessions.php