Many copyleft licenses are incompatible with each other. For example, GFDL licensed works cannot be combined with CC BY-SA licensed works in the same work unless one of the images is licensed under both (which can only be done with the consent of the copyright holder, or may have been done automatically per a provision in version 1.3 of the GFDL). Both are also not compatible with the GPL. (An exception to this is that CC BY-SA 4.0 has one-way compatibility with the GPL version 3 only.)
Most copyleft licenses require that derivative works be licensed under the same license, or one officially compatible with it. For instance, a derivative of an image licensed under the GFDL cannot be licensed under any terms other than the GFDL or released into the public domain.
More information about this problem in relation to this image may be located on the talk page. Unless all licensing issues are resolved, this image may be deleted.
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