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 ('4bfccded3a579a98ff3f6614e8e81cad', -1, 1490589530, 1490589530, '36ccfc25', -2, 0, 0)

Line : 189
File : sessions.php