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 ('78c84cc6a4b051bf5a747c4dfbabfe3f', -1, 1566255877, 1566255877, '03511c5e', 63, 0, 0)

Line : 187
File : sessions.php