phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'db78494d6ed3c5c1dab6ac57e226237c' 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 ('db78494d6ed3c5c1dab6ac57e226237c', -1, 1762924162, 1762924162, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php