phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4dd4da1b1a28ba5ab7985b6c11e89b7d', -1, 1503407191, 1503407191, '36512a6f', 3, 0, 0)

Line : 189
File : sessions.php