diff --git a/frontend/src/components/admin/BatchTestReassignmentAndCancellation/BatchTestReassignmentAndCancelation.js b/frontend/src/components/admin/BatchTestReassignmentAndCancellation/BatchTestReassignmentAndCancelation.js
index 78ec58294..1fd1783d9 100644
--- a/frontend/src/components/admin/BatchTestReassignmentAndCancellation/BatchTestReassignmentAndCancelation.js
+++ b/frontend/src/components/admin/BatchTestReassignmentAndCancellation/BatchTestReassignmentAndCancelation.js
@@ -54,7 +54,7 @@ function BatchTestReassignmentAndCancelation() {
   const [saveButton, setSaveButton] = useState(true);
   const [isLoading, setIsLoading] = useState(true);
   const [currentTest, setCurrentTest] = useState(true);
-  const [replaceWith, setReplaceWith] = useState(false);
+  const [replaceWith, setReplaceWith] = useState(true);
   const [batchTestGet, setBatchTestGet] = useState(null);
   const [batchTestPost, setBatchTestPost] = useState(null);
   const [sampleTypeListShow, setSampleTypeListShow] = useState([]);
@@ -81,7 +81,6 @@ function BatchTestReassignmentAndCancelation() {
     noChangeTechReject: [],
     noChangeBioReject: [],
     noChangeNotValidated: [],
-    replace: "",
   });
   const [changesToShow, setChangesToShow] = useState(false);
 
@@ -346,7 +345,7 @@ function BatchTestReassignmentAndCancelation() {
       setSampleTestTypeToGetTagList(updatedList);
     }
 
-    const updatedReplace = updatedList.map((item) => item.id).join(",");
+    const updatedReplace = updatedList.map((item) => item.id);
     setJsonWad((prevJsonWad) => ({
       ...prevJsonWad,
       replace: updatedReplace,
@@ -359,7 +358,7 @@ function BatchTestReassignmentAndCancelation() {
         (_, index) => index !== indexToRemove,
       );
 
-      const updatedReplace = updatedTags.map((item) => item.id).join(",");
+      const updatedReplace = updatedTags.map((item) => item.id);
       setJsonWad((prevJsonWad) => ({
         ...prevJsonWad,
         replace: updatedReplace,
@@ -517,7 +516,7 @@ function BatchTestReassignmentAndCancelation() {
                   if (replaceWith) {
                     setJsonWad((prevJsonWad) => ({
                       ...prevJsonWad,
-                      replace: "",
+                      replace: [],
                     }));
                   } else {
                     const selectedTestIds = sampleTestTypeToGetTagList
@@ -1006,62 +1005,6 @@ function BatchTestReassignmentAndCancelation() {
             <></>
           )}
         </div>
-        <button
-          onClick={() => {
-            console.log(batchTestGet.sampleList);
-          }}
-        >
-          batchTestGet.sampleList
-        </button>
-        <button
-          onClick={() => {
-            console.log(batchTestPost);
-          }}
-        >
-          batchTestPost
-        </button>
-        <button
-          onClick={() => {
-            console.log(sampleTypeToGetId);
-          }}
-        >
-          sampleTypeToGetId
-        </button>
-        <button
-          onClick={() => {
-            console.log(sampleTypeToGetIdData);
-          }}
-        >
-          sampleTypeToGetIdData
-        </button>
-        <button
-          onClick={() => {
-            console.log(sampleTypeToGetIdDataTag);
-          }}
-        >
-          sampleTypeToGetIdDataTag
-        </button>
-        <button
-          onClick={() => {
-            console.log(sampleTypeTestIdToGetIdPendingData);
-          }}
-        >
-          sampleTypeTestIdToGetIdPendingData
-        </button>
-        <button
-          onClick={() => {
-            console.log(jsonWad);
-          }}
-        >
-          jsonWad
-        </button>
-        <button
-          onClick={() => {
-            console.log(sampleTestTypeToGetTagList);
-          }}
-        >
-          sampleTestTypeToGetTagList
-        </button>
       </div>
     </>
   );
diff --git a/src/main/java/org/openelisglobal/test/controller/rest/BatchTestReassignmentRestController.java b/src/main/java/org/openelisglobal/test/controller/rest/BatchTestReassignmentRestController.java
index 77e0f2cc5..a8944ce74 100644
--- a/src/main/java/org/openelisglobal/test/controller/rest/BatchTestReassignmentRestController.java
+++ b/src/main/java/org/openelisglobal/test/controller/rest/BatchTestReassignmentRestController.java
@@ -115,14 +115,14 @@ private void manageAnalysis(String jsonString, List<Analysis> cancelAnalysis, Li
         try {
             JSONObject obj = (JSONObject) parser.parse(jsonString);
             List<Test> newTests = getNewTestsFromJson(obj, parser);
-            List<Analysis> changedNotStarted = getAnalysisFromJson((String) obj.get("changeNotStarted"), parser);
-            List<Analysis> noChangedNotStarted = getAnalysisFromJson((String) obj.get("noChangeNotStarted"), parser);
-            List<Analysis> changeTechReject = getAnalysisFromJson((String) obj.get("changeTechReject"), parser);
-            List<Analysis> noChangeTechReject = getAnalysisFromJson((String) obj.get("noChangeTechReject"), parser);
-            List<Analysis> changeBioReject = getAnalysisFromJson((String) obj.get("changeBioReject"), parser);
-            List<Analysis> noChangeBioReject = getAnalysisFromJson((String) obj.get("noChangeBioReject"), parser);
-            List<Analysis> changeNotValidated = getAnalysisFromJson((String) obj.get("changeNotValidated"), parser);
-            List<Analysis> noChangeNotValidated = getAnalysisFromJson((String) obj.get("noChangeNotValidated"), parser);
+            List<Analysis> changedNotStarted = getAnalysisFromJson(obj.get("changeNotStarted"), parser);
+            List<Analysis> noChangedNotStarted = getAnalysisFromJson(obj.get("noChangeNotStarted"), parser);
+            List<Analysis> changeTechReject = getAnalysisFromJson(obj.get("changeTechReject"), parser);
+            List<Analysis> noChangeTechReject = getAnalysisFromJson(obj.get("noChangeTechReject"), parser);
+            List<Analysis> changeBioReject = getAnalysisFromJson(obj.get("changeBioReject"), parser);
+            List<Analysis> noChangeBioReject = getAnalysisFromJson(obj.get("noChangeBioReject"), parser);
+            List<Analysis> changeNotValidated = getAnalysisFromJson(obj.get("changeNotValidated"), parser);
+            List<Analysis> noChangeNotValidated = getAnalysisFromJson(obj.get("noChangeNotValidated"), parser);
 
             verifyStatusNotChanged(changedNotStarted, noChangedNotStarted, StatusService.AnalysisStatus.NotStarted,
                     changeBeans);
@@ -236,27 +236,20 @@ private String getStatusName(StatusService.AnalysisStatus status) {
     private List<Test> getNewTestsFromJson(JSONObject obj, JSONParser parser) {
         List<Test> replacementTestList = new ArrayList<>();
 
-        String replacementTests = (String) obj.get("replace");
-        if (replacementTests == null) {
-            return replacementTestList;
-        }
-
-        JSONArray replacementTestArray;
-        try {
-            replacementTestArray = (JSONArray) parser.parse(replacementTests);
-        } catch (ParseException e) {
-            LogEvent.logDebug(e);
+        JSONArray replacementTestArray = (JSONArray) obj.get("replace");
+        if (replacementTestArray == null) {
             return replacementTestList;
         }
 
         for (Object testIdObject : replacementTestArray) {
-            replacementTestList.add(SpringContext.getBean(TestService.class).get((String) testIdObject));
+            String testId = (String) testIdObject;
+            replacementTestList.add(SpringContext.getBean(TestService.class).get((String) testId));
         }
 
         return replacementTestList;
     }
 
-    private List<Analysis> getAnalysisFromJson(String sampleIdList, JSONParser parser) {
+    private List<Analysis> getAnalysisFromJson(Object sampleIdList, JSONParser parser) {
         List<Analysis> analysisList = new ArrayList<>();
 
         if (sampleIdList == null) {
@@ -264,10 +257,16 @@ private List<Analysis> getAnalysisFromJson(String sampleIdList, JSONParser parse
         }
 
         JSONArray modifyAnalysisArray;
-        try {
-            modifyAnalysisArray = (JSONArray) parser.parse(sampleIdList);
-        } catch (ParseException e) {
-            LogEvent.logDebug(e);
+        if (sampleIdList instanceof String) {
+            try {
+                modifyAnalysisArray = (JSONArray) parser.parse((String) sampleIdList);
+            } catch (ParseException e) {
+                LogEvent.logDebug(e);
+                return analysisList;
+            }
+        } else if (sampleIdList instanceof JSONArray) {
+            modifyAnalysisArray = (JSONArray) sampleIdList;
+        } else {
             return analysisList;
         }