diff --git a/api/src/org/labkey/api/dataiterator/AbstractDataIterator.java b/api/src/org/labkey/api/dataiterator/AbstractDataIterator.java
index c3995b9e220..e32ddc40a2b 100644
--- a/api/src/org/labkey/api/dataiterator/AbstractDataIterator.java
+++ b/api/src/org/labkey/api/dataiterator/AbstractDataIterator.java
@@ -16,6 +16,7 @@
 
 package org.labkey.api.dataiterator;
 
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.labkey.api.query.BatchValidationException;
 import org.labkey.api.query.QueryUpdateService;
@@ -143,6 +144,15 @@ protected String getDataSource()
         return _context.getDataSource();
     }
 
+    protected boolean hasLoggedWarning(@NotNull String warning)
+    {
+        return _context.hasLoggedWarning(warning);
+    }
+
+    protected void addLoggedWarning(@NotNull String warning)
+    {
+        _context.addLoggedWarning(warning);
+    }
 
     protected Integer indexOfExistingRecord;
 
diff --git a/api/src/org/labkey/api/dataiterator/DataIteratorContext.java b/api/src/org/labkey/api/dataiterator/DataIteratorContext.java
index 12713d9605b..231e6b91206 100644
--- a/api/src/org/labkey/api/dataiterator/DataIteratorContext.java
+++ b/api/src/org/labkey/api/dataiterator/DataIteratorContext.java
@@ -26,6 +26,7 @@
 
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
@@ -60,6 +61,7 @@ public class DataIteratorContext
     private final Set<String> _passThroughBuiltInColumnNames = new CaseInsensitiveHashSet();
     private final Set<String> _dontUpdateColumnNames = new CaseInsensitiveHashSet();
     private final Set<String> _alternateKeys = new CaseInsensitiveHashSet();
+    private final Set<String> _loggedWarnings = new HashSet<>();
     private String _dataSource;
     private boolean _withLookupRemapping = true;
 
@@ -337,4 +339,14 @@ public QueryImportPipelineJob getBackgroundJob()
         return _backgroundJob;
     }
 
+    public boolean hasLoggedWarning(@NotNull String warning)
+    {
+        return _loggedWarnings.contains(warning);
+    }
+
+    public void addLoggedWarning(@NotNull String warning)
+    {
+        _loggedWarnings.add(warning);
+    }
+
 }
diff --git a/api/src/org/labkey/api/dataiterator/SimpleTranslator.java b/api/src/org/labkey/api/dataiterator/SimpleTranslator.java
index 8480f6f93bd..3777a92fb50 100644
--- a/api/src/org/labkey/api/dataiterator/SimpleTranslator.java
+++ b/api/src/org/labkey/api/dataiterator/SimpleTranslator.java
@@ -557,9 +557,21 @@ private Object getDerivationData(Object thisValue, int derivationDataColInd, boo
         if (thisValue != null)
         {
             if (isDerivationField && presentDerivationWarning != null)
-                LOG.warn(presentDerivationWarning);
+            {
+                if (!hasLoggedWarning(presentDerivationWarning))
+                {
+                    LOG.warn(presentDerivationWarning);
+                    addLoggedWarning(presentDerivationWarning);
+                }
+            }
             else if (!isDerivationField && presentNonDerivationWarning != null)
-                LOG.warn(presentNonDerivationWarning);
+            {
+                if (!hasLoggedWarning(presentNonDerivationWarning))
+                {
+                    LOG.warn(presentNonDerivationWarning);
+                    addLoggedWarning(presentNonDerivationWarning);
+                }
+            }
         }
 
         return null;