phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : -1 ERROR: duplicate key value violates unique constraint "phpbb_session_pkey" DETAIL: Key (session_id)=(e926947121e243ae69a8c4ede0bde54c) already exists.

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('e926947121e243ae69a8c4ede0bde54c', -1, 1566783055, 1566783055, '22ef9e6b', 39, 0, 0)

Line : 187
File : sessions.php