When Home Assistant reports a new attribute for an entity after the initial
sync (e.g. source_list or media_channel appearing when a media player becomes
active), setState was called without a corresponding ioBroker object — causing
'has no existing object' warnings.
Fix: check if the attribute object exists in hassObjects before calling
setState. If missing, create it on-the-fly via setForeignObjectAsync before
writing the state.
GermanBluefox
Torsten Pattberg
Matthias KleineandGitHub