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The description on its file description page there is shown below.
This flag is fictitious, proposed, or locally used unofficially. It has not been adopted in an official capacity, and although it may be named as if it was an official flag of a geographical or other entity and have some visual elements that are similar to official logos or flags of that entity, it does not have any official recognition. A flag of this type should not be added to any articles or pages unless it is officially proposed by a government agency, covered by the media, or sees notable local use.
Not an official insignia: This cat should not be considered official.
It is just a proposal of an artist (drawer), and it is not in any official use.
The factual accuracy of this description or the file name is disputed.
Reason: There's no indication of the historical use of this flag design in reliable secondary sources. This is not an official or historical flag, but a fictitious user-made one.
Summary
DescriptionBendera Kesultanan Kutai Kartanegara ing Martadipura.png
English: The flag of Kutai Kartanegara ing Martadipura
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.