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 ('0d3d2c4f5caf2f91ba886e5f00294c4d', -1, 1510953628, 1510953628, '36c40283', -4, 0, 0)

Line : 187
File : sessions.php