diff --git a/lib/manager/maven/update.js b/lib/manager/maven/update.js
index 05dddbf6dd19780c7f4f860ea426865a8b6b8d4d..aabffbbdc3e282bbac44b1cb15a8ffaaf9378d56 100644
--- a/lib/manager/maven/update.js
+++ b/lib/manager/maven/update.js
@@ -20,6 +20,9 @@ function updateAtPosition(fileContent, upgrade, endingAnchor = '"') {
     const replacedPart = versionPart.replace(currentValue, newValue);
     return leftPart + replacedPart + restPart;
   }
+  if (upgrade.groupName) {
+    return fileContent;
+  }
   logger.debug({ depName, version, currentValue, newValue }, 'Unknown value');
   return null;
 }
diff --git a/test/manager/maven/index.spec.js b/test/manager/maven/index.spec.js
index 366f507f83e46db96a9c282c8ed19bf372ff5283..9f4edf4a99231ae56fa580cf31e1203d08a5d2d2 100644
--- a/test/manager/maven/index.spec.js
+++ b/test/manager/maven/index.spec.js
@@ -95,6 +95,26 @@ describe('manager/maven', () => {
       expect(pomContent).toBe(updatedContent);
     });
 
+    it('should not touch content for the second update of grouped dependency', async () => {
+      platform.getFile.mockReturnValueOnce(pomContent);
+      const [{ deps }] = await extractAllPackageFiles({}, ['pom.xml']);
+      const dep1 = selectDep(deps, 'org.example:quux');
+      const dep2 = selectDep(deps, 'org.example:quux-test');
+
+      const upgrade1 = { ...dep1, newValue: '2.0.0', groupName: 'quuxVersion' };
+      const previouslyUpdatedContent = updateDependency(pomContent, upgrade1);
+      expect(previouslyUpdatedContent).toEqual(
+        pomContent.replace('1.2.3.4', '2.0.0')
+      );
+
+      const upgrade2 = { ...dep2, newValue: '1.9.9', groupName: 'quuxVersion' };
+      const updatedContent = updateDependency(
+        previouslyUpdatedContent,
+        upgrade2
+      );
+      expect(updatedContent).toBe(previouslyUpdatedContent);
+    });
+
     it('should return null if current versions in content and upgrade are not same', () => {
       const currentValue = '1.2.2';
       const newValue = '1.2.4';