phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4261b4e15a48087d74c642ee69765864' 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 ('4261b4e15a48087d74c642ee69765864', -1, 1548044297, 1548044297, '36ea72ca', 4, 0, 0)

Line : 187
File : sessions.php