Recreate citation label after paste

Fixes: #10829

src/CutAndPaste.cpp

@@ -40,6 +40,7 @@
 
 #include "insets/InsetBibitem.h"
 #include "insets/InsetBranch.h"
+#include "insets/InsetCitation.h"
 #include "insets/InsetCommand.h"
 #include "insets/InsetFlex.h"
 #include "insets/InsetGraphics.h"
@@ -322,6 +323,16 @@ pasteSelectionHelper(DocIterator const & cur, ParagraphList const & parlist,
 			break;
 		}
 
+		case CITE_CODE: {
+			InsetCitation & cit = static_cast<InsetCitation &>(*it);
+			// This actually only needs to be done if the cite engine
+			// differs, but we do it in general.
+			cit.redoLabel();
+			// We need to update the list of citations.
+			need_update = true;
+			break;
+		}
+
 		case BIBITEM_CODE: {
 			// check for duplicates
 			InsetBibitem & bib = static_cast<InsetBibitem &>(*it);

src/insets/InsetCitation.h

@@ -82,6 +82,8 @@ public:
 	static bool isCompatibleCommand(std::string const &);
 	//@}
 	///
+	void redoLabel() { cache.recalculate = true; }
+	///
 	CitationStyle getCitationStyle(BufferParams const & bp, std::string const & input,
 				       std::vector<CitationStyle> const & valid_styles) const;
 	///