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 ('75f6805a77f7e9299d2e42c041e6a1c0', -1, 1548198374, 1548198374, '36535d55', 4, 0, 0)

Line : 187
File : sessions.php