phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '721e1693134525775ea42d893aae30ad' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('721e1693134525775ea42d893aae30ad', -1, 1766376760, 1766376760, 'd849d8b8', -19, 0, 0)

Line : 187
File : sessions.php