phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c4d84dddb6311c17996f38073ecd574a' 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 ('c4d84dddb6311c17996f38073ecd574a', -1, 1769308623, 1769308623, 'd849d814', -4, 0, 0)

Line : 187
File : sessions.php