phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ffa468f7c36ab5001c3a03dc2ca4b5fe' 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 ('ffa468f7c36ab5001c3a03dc2ca4b5fe', -1, 1757192511, 1757192511, 'd849d888', 2, 0, 0)

Line : 187
File : sessions.php