diff --git a/astra/src/main/java/com/slack/astra/logstore/schema/SchemaAwareLogDocumentBuilderImpl.java b/astra/src/main/java/com/slack/astra/logstore/schema/SchemaAwareLogDocumentBuilderImpl.java
index a606c1be2e..ce0fcc7a39 100644
--- a/astra/src/main/java/com/slack/astra/logstore/schema/SchemaAwareLogDocumentBuilderImpl.java
+++ b/astra/src/main/java/com/slack/astra/logstore/schema/SchemaAwareLogDocumentBuilderImpl.java
@@ -262,7 +262,8 @@ private void convertValueAndIndexField(
         indexTypedField(doc, key, convertedValue, registeredField);
       } else {
         LOG.warn(
-            "No mapping found to convert value from={} to={}",
+            "No mapping found to convert key={} value from={} to={}",
+            key,
             valueType.name,
             registeredField.fieldType.name);
         convertErrorCounter.increment();
diff --git a/astra/src/main/java/com/slack/astra/metadata/schema/FieldType.java b/astra/src/main/java/com/slack/astra/metadata/schema/FieldType.java
index 155e05ac29..5e60c87f55 100644
--- a/astra/src/main/java/com/slack/astra/metadata/schema/FieldType.java
+++ b/astra/src/main/java/com/slack/astra/metadata/schema/FieldType.java
@@ -404,6 +404,9 @@ public static Object convertFieldValue(Object value, FieldType fromType, FieldTy
       if (toType == FieldType.BOOLEAN) {
         return ((String) value).equals("1") || ((String) value).equalsIgnoreCase("true");
       }
+      if (toType == FieldType.BINARY) {
+        return ByteString.copyFromUtf8((String) value);
+      }
     }
 
     // Int type
@@ -499,6 +502,11 @@ public static Object convertFieldValue(Object value, FieldType fromType, FieldTy
         return (Boolean) value ? 1d : 0d;
       }
     }
+    if (fromType == FieldType.BINARY) {
+      if (isTexty(toType)) {
+        return ((ByteString) value).toStringUtf8();
+      }
+    }
     return null;
   }
 
diff --git a/astra/src/test/java/com/slack/astra/metadata/schema/FieldTypeTest.java b/astra/src/test/java/com/slack/astra/metadata/schema/FieldTypeTest.java
index 40cdc2b566..943dc547d2 100644
--- a/astra/src/test/java/com/slack/astra/metadata/schema/FieldTypeTest.java
+++ b/astra/src/test/java/com/slack/astra/metadata/schema/FieldTypeTest.java
@@ -3,6 +3,7 @@
 import static com.slack.astra.metadata.schema.FieldType.convertFieldValue;
 import static org.assertj.core.api.Assertions.assertThat;
 
+import com.google.protobuf.ByteString;
 import org.junit.jupiter.api.Test;
 
 public class FieldTypeTest {
@@ -14,6 +15,8 @@ public void testValueTypeConversionWorks() {
     assertThat(convertFieldValue("3", FieldType.TEXT, FieldType.DOUBLE)).isEqualTo(3.0d);
     assertThat(convertFieldValue("4", FieldType.TEXT, FieldType.STRING)).isEqualTo("4");
     assertThat(convertFieldValue("4", FieldType.STRING, FieldType.TEXT)).isEqualTo("4");
+    assertThat(convertFieldValue("[1,2,3]", FieldType.KEYWORD, FieldType.BINARY))
+        .isEqualTo(ByteString.copyFromUtf8("[1,2,3]"));
     assertThat(convertFieldValue("1", FieldType.STRING, FieldType.BOOLEAN)).isEqualTo(true);
     assertThat(convertFieldValue("0", FieldType.STRING, FieldType.BOOLEAN)).isEqualTo(false);
     assertThat(convertFieldValue("true", FieldType.STRING, FieldType.BOOLEAN)).isEqualTo(true);
@@ -132,5 +135,10 @@ public void testValueTypeConversionWorks() {
     assertThat(convertFieldValue(1L, FieldType.LONG, FieldType.LONG)).isEqualTo(1L);
     assertThat(convertFieldValue(2.0f, FieldType.FLOAT, FieldType.FLOAT)).isEqualTo(2.0f);
     assertThat(convertFieldValue(3.0d, FieldType.DOUBLE, FieldType.DOUBLE)).isEqualTo(3.0d);
+
+    assertThat(
+            convertFieldValue(
+                ByteString.copyFromUtf8("[1,2,3]"), FieldType.BINARY, FieldType.KEYWORD))
+        .isEqualTo("[1,2,3]");
   }
 }