diff --git a/src/dstack/_internal/core/backends/hotaisle/api_client.py b/src/dstack/_internal/core/backends/hotaisle/api_client.py
index 866ff2acbd..c4608bd252 100644
--- a/src/dstack/_internal/core/backends/hotaisle/api_client.py
+++ b/src/dstack/_internal/core/backends/hotaisle/api_client.py
@@ -16,46 +16,38 @@ def __init__(self, api_key: str, team_handle: str):
         self.team_handle = team_handle
 
     def validate_api_key(self) -> bool:
+        url = f"{API_URL}/user/"
         try:
-            self._validate_user_and_team()
-            return True
+            response = self._make_request("GET", url)
+            response.raise_for_status()
         except requests.HTTPError as e:
-            if e.response.status_code == 401:
-                raise_invalid_credentials_error(
-                    fields=[["creds", "api_key"]], details="Invalid API key"
-                )
-            elif e.response.status_code == 403:
-                raise_invalid_credentials_error(
-                    fields=[["creds", "api_key"]],
-                    details="Authenticated user does note have required permissions",
-                )
-            raise e
-        except ValueError as e:
-            error_message = str(e)
-            if "No Hot Aisle teams found" in error_message:
-                raise_invalid_credentials_error(
-                    fields=[["creds", "api_key"]],
-                    details="Valid API key but no teams found for this user",
-                )
-            elif "not found" in error_message:
-                raise_invalid_credentials_error(
-                    fields=[["team_handle"]], details=f"Team handle '{self.team_handle}' not found"
-                )
-            raise e
-
-    def _validate_user_and_team(self) -> None:
-        url = f"{API_URL}/user/"
-        response = self._make_request("GET", url)
-        response.raise_for_status()
-        user_data = response.json()
+            if e.response is not None:
+                if e.response.status_code == 401:
+                    raise_invalid_credentials_error(
+                        fields=[["creds", "api_key"]], details="Invalid API key"
+                    )
+                if e.response.status_code == 403:
+                    raise_invalid_credentials_error(
+                        fields=[["creds", "api_key"]],
+                        details="Authenticated user does not have required permissions",
+                    )
+            raise
 
-        teams = user_data.get("teams", [])
+        user_data = response.json()
+        teams = user_data["teams"]
         if not teams:
-            raise ValueError("No Hot Aisle teams found for this user")
+            raise_invalid_credentials_error(
+                fields=[["creds", "api_key"]],
+                details="Valid API key but no teams found for this user",
+            )
 
         available_teams = [team["handle"] for team in teams]
         if self.team_handle not in available_teams:
-            raise ValueError(f"Hot Aisle team '{self.team_handle}' not found.")
+            raise_invalid_credentials_error(
+                fields=[["team_handle"]],
+                details=f"Team handle '{self.team_handle}' not found",
+            )
+        return True
 
     def upload_ssh_key(self, public_key: str) -> bool:
         url = f"{API_URL}/user/ssh_keys/"
diff --git a/src/dstack/_internal/core/backends/hotaisle/compute.py b/src/dstack/_internal/core/backends/hotaisle/compute.py
index 8502f3fe2b..8aa83b88ca 100644
--- a/src/dstack/_internal/core/backends/hotaisle/compute.py
+++ b/src/dstack/_internal/core/backends/hotaisle/compute.py
@@ -28,8 +28,6 @@
 
 logger = get_logger(__name__)
 
-MAX_INSTANCE_NAME_LEN = 60
-
 
 INSTANCE_TYPE_SPECS = {
     "1x MI300X 8x Xeon Platinum 8462Y+": {
@@ -130,9 +128,7 @@ def create_instance(
             ssh_port=22,
             dockerized=True,
             ssh_proxy=None,
-            backend_data=HotAisleInstanceBackendData(
-                ip_address=vm_data["ip_address"], vm_id=vm_data["name"]
-            ).json(),
+            backend_data=HotAisleInstanceBackendData(ip_address=vm_data["ip_address"]).json(),
         )
 
     def update_provisioning_data(
@@ -217,7 +213,6 @@ def _run_ssh_command(hostname: str, ssh_private_key: str, command: str):
 
 class HotAisleInstanceBackendData(CoreModel):
     ip_address: str
-    vm_id: Optional[str] = None
 
     @classmethod
     def load(cls, raw: Optional[str]) -> "HotAisleInstanceBackendData":