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 ('12a98e4ecff8b99e05a59e7d7fd3ae05', -1, 1540168196, 1540168196, '36a14d1e', 29, 0, 0)

Line : 189
File : sessions.php