X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.document.server.io%2Fsrc%2Forg%2Fsimantics%2Fdocument%2Fserver%2Fio%2FCommandContextImpl.java;h=5fb3a283e93a0b635768e5517fc1b3e6f14ac50d;hp=5b49810fad9f8109c5a4a637ab24444ea3bf059c;hb=c8072aba53c02652c71bbd9c8e694a52577965d2;hpb=7ffbcb78ddb8c619bd5a88fbbcd6f079cc1684fc

diff --git a/bundles/org.simantics.document.server.io/src/org/simantics/document/server/io/CommandContextImpl.java b/bundles/org.simantics.document.server.io/src/org/simantics/document/server/io/CommandContextImpl.java
index 5b49810fa..5fb3a283e 100644
--- a/bundles/org.simantics.document.server.io/src/org/simantics/document/server/io/CommandContextImpl.java
+++ b/bundles/org.simantics.document.server.io/src/org/simantics/document/server/io/CommandContextImpl.java
@@ -66,6 +66,12 @@ public class CommandContextImpl implements CommandContextMutable {
 		if (context != null) {
 			Map<String,List<List<Object>>> from = context.getData(); 
 			for (Map.Entry<String, List<List<Object>>> entry : from.entrySet()) {
+				String key = entry.getKey();
+				Object existing = getValue(key);
+				Object newValue = context.getValue(key);
+				// Do not merge duplicates!
+				if (newValue != null && newValue.equals(existing))
+					continue;
 				List<List<Object>> rows = ensureRowsAvailable(entry.getKey());
 				rows.addAll(entry.getValue());
 			}