phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1c15289c38cc126c5ca78f905bfb18e9' 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 ('1c15289c38cc126c5ca78f905bfb18e9', -1, 1550691276, 1550691276, '36d23d29', 14, 0, 0)

Line : 198
File : sessions.php