phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b31e0070c7553b0415124b8abed20501' 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 ('b31e0070c7553b0415124b8abed20501', -1, 1506144868, 1506144868, '36501a74', -1, 0, 0)

Line : 194
File : sessions.php