Both run engines will only lock to versions they can handle

apps/webapp/app/v3/models/workerDeployment.server.ts

@@ -71,6 +71,7 @@ export async function findCurrentWorkerDeployment(
           id: true,
           imageReference: true,
           version: true,
+          type: true,
           worker: {
             select: {
               id: true,
@@ -88,7 +89,49 @@ export async function findCurrentWorkerDeployment(
     },
   });
 
-  return promotion?.deployment;
+  if (!promotion) {
+    return undefined;
+  }
+
+  if (promotion.deployment.type === "V1") {
+    // This is a run engine v1 deployment, so return it
+    return promotion.deployment;
+  }
+
+  // We need to get the latest run engine v1 deployment
+  const latestV1Deployment = await prisma.workerDeployment.findFirst({
+    where: {
+      environmentId,
+      type: "V1",
+    },
+    orderBy: {
+      id: "desc",
+    },
+    select: {
+      id: true,
+      imageReference: true,
+      version: true,
+      type: true,
+      worker: {
+        select: {
+          id: true,
+          friendlyId: true,
+          version: true,
+          sdkVersion: true,
+          cliVersion: true,
+          supportsLazyAttempts: true,
+          tasks: true,
+          engine: true,
+        },
+      },
+    },
+  });
+
+  if (!latestV1Deployment) {
+    return undefined;
+  }
+
+  return latestV1Deployment;
 }
 
 export async function getCurrentWorkerDeploymentEngineVersion(

internal-packages/run-engine/src/engine/db/worker.ts

@@ -289,10 +289,43 @@ export async function getWorkerFromCurrentlyPromotedDeployment(
     return null;
   }
 
+  if (promotion.deployment.type === "MANAGED") {
+    // This is a run engine v2 deployment, so return it
+    return {
+      worker: promotion.deployment.worker,
+      tasks: promotion.deployment.worker.tasks,
+      queues: promotion.deployment.worker.queues,
+      deployment: promotion.deployment,
+    };
+  }
+
+  // We need to get the latest run engine v2 deployment
+  const latestV2Deployment = await prisma.workerDeployment.findFirst({
+    where: {
+      environmentId,
+      type: "MANAGED",
+    },
+    orderBy: {
+      id: "desc",
+    },
+    include: {
+      worker: {
+        include: {
+          tasks: true,
+          queues: true,
+        },
+      },
+    },
+  });
+
+  if (!latestV2Deployment?.worker) {
+    return null;
+  }
+
   return {
-    worker: promotion.deployment.worker,
-    tasks: promotion.deployment.worker.tasks,
-    queues: promotion.deployment.worker.queues,
-    deployment: promotion.deployment,
+    worker: latestV2Deployment.worker,
+    tasks: latestV2Deployment.worker.tasks,
+    queues: latestV2Deployment.worker.queues,
+    deployment: latestV2Deployment,
   };
 }

internal-packages/run-engine/src/engine/tests/setup.ts

@@ -97,6 +97,7 @@ export async function setupBackgroundWorker(
       runtimeEnvironmentId: environment.id,
       version: nextVersion,
       metadata: {},
+      engine: "V2",
     },
   });
 
@@ -234,6 +235,7 @@ export async function setupBackgroundWorker(
         projectId: environment.project.id,
         environmentId: environment.id,
         workerId: worker.id,
+        type: "MANAGED",
       },
     });