phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f4391f9b4eb414378f4e57c128fee24a' 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 ('f4391f9b4eb414378f4e57c128fee24a', -1, 1764004763, 1764004763, 'd849d82b', -4, 0, 0)

Line : 187
File : sessions.php