phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9c8c31e5cf44f73d71c35d98447c6f5b' 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 ('9c8c31e5cf44f73d71c35d98447c6f5b', -1, 1765730909, 1765730909, 'd849d836', -4, 0, 0)

Line : 187
File : sessions.php