phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b5050c59f1dfce5f2a3ffc5fc2285c1f' 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 ('b5050c59f1dfce5f2a3ffc5fc2285c1f', -1, 1777197871, 1777197871, 'd849d926', 1, 0, 0)

Line : 187
File : sessions.php