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 ('ec2d33bfe9c32a8d7aa2753f4ed0311a', -1, 1518897144, 1518897144, '6b145e06', 4, 0, 0)

Line : 187
File : sessions.php