phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '15b9698962dc1127a902e0d4354cd506' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('15b9698962dc1127a902e0d4354cd506', -1, 1771845012, 1771845012, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php