phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b43514a89166ae974886237a620e5ed2' 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 ('b43514a89166ae974886237a620e5ed2', -1, 1472393636, 1472393636, '36c6e3c4', 25, 0, 0)

Line : 187
File : sessions.php