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 ('26e0b0c0cbb7d793525278bd4bbc32d3', -1, 1508436781, 1508436781, '365c8dd3', -1, 0, 0)

Line : 172
File : sessions.php