diff -rupN scribus-1.5.6.1/scribus/pdf_analyzer.cpp scribus-1.5.6.1-new/scribus/pdf_analyzer.cpp
--- scribus-1.5.6.1/scribus/pdf_analyzer.cpp	2020-11-14 23:37:18.000000000 +0100
+++ scribus-1.5.6.1-new/scribus/pdf_analyzer.cpp	2021-01-10 17:11:46.352584802 +0100
@@ -139,7 +139,6 @@ PDFColorSpace PDFAnalyzer::getCSType(Pdf
 					{
 						pBase = cs->GetOwner()->GetObject(base.GetReference());
 					}
-					pBase->SetOwner(cs->GetOwner());
 					return getCSType(pBase);
 				}
 				if (csTypeName == "Separation")