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 ('02e21f9466c66e8cdf90a0bf4b1fc3f1', -1, 1508436884, 1508436884, '365c8dd3', -8, 0, 0)

Line : 172
File : sessions.php