phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ff939c4813e770283e22ab70d0b374a6' 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 ('ff939c4813e770283e22ab70d0b374a6', -1, 1769422807, 1769422807, 'd849d83c', 6, 0, 0)

Line : 187
File : sessions.php