diff --git a/commandsv2/CommandsV2.json b/commandsv2/CommandsV2.json
index 7ddbe91b67..d88c22deeb 100644
--- a/commandsv2/CommandsV2.json
+++ b/commandsv2/CommandsV2.json
@@ -6,6 +6,13 @@
   "frcYear": "2027_alpha1",
   "mavenUrls": [],
   "jsonUrl": "",
+  "conflictsWith": [
+    {
+      "uuid": "4decdc05-a056-46cf-9561-39449bbb01306",
+      "errorMessage": "Users can not have both Commands v2 and Commands v3 vendordeps in their robot program.",
+      "offlineFileName": "CommandsV3.json"
+    }
+  ],
   "javaDependencies": [
     {
       "groupId": "org.wpilib.commandsv2",
diff --git a/commandsv3/CommandsV3.json b/commandsv3/CommandsV3.json
index 255724fec2..acb3dd9211 100644
--- a/commandsv3/CommandsV3.json
+++ b/commandsv3/CommandsV3.json
@@ -6,6 +6,13 @@
   "frcYear": "2027_alpha1",
   "mavenUrls": [],
   "jsonUrl": "",
+  "conflictsWith": [
+    {
+      "uuid": "111e20f7-815e-48f8-9dd6-e675ce75b266",
+      "errorMessage": "Users can not have both Commands v2 and Commands v3 vendordeps in their robot program.",
+      "offlineFileName": "CommandsV2.json"
+    }
+  ],
   "javaDependencies": [
     {
       "groupId": "org.wpilib",