diff --git a/src/dstack/_internal/core/models/envs.py b/src/dstack/_internal/core/models/envs.py
index 268e39118..03e7b6031 100644
--- a/src/dstack/_internal/core/models/envs.py
+++ b/src/dstack/_internal/core/models/envs.py
@@ -102,10 +102,11 @@ def __setitem__(self, item, value):
     def copy(self, **kwargs) -> Self:
         # Env.copy() is tricky because it copies only the hidden top-level {"__root__": {...}}
         # structure, not the actual nested dict representing the env itself.
-        # To avoid possible bugs, we prohibit shallow copying altogether.
+        # So we copy __root__ explicitly in case of a shallow copy.
+        new_copy = super().copy(**kwargs)
         if not kwargs.get("deep", False):
-            raise TypeError(f"shallow copying of {self.__class__.__name__} is prohibited")
-        return super().copy(**kwargs)
+            new_copy.__root__ = new_copy.__root__.copy()
+        return new_copy
 
     def as_dict(self) -> Dict[str, str]:
         """
diff --git a/src/dstack/_internal/core/models/profiles.py b/src/dstack/_internal/core/models/profiles.py
index 2b01ddc45..89767a240 100644
--- a/src/dstack/_internal/core/models/profiles.py
+++ b/src/dstack/_internal/core/models/profiles.py
@@ -1,5 +1,5 @@
 from enum import Enum
-from typing import List, Optional, Union, overload
+from typing import Any, Dict, List, Optional, Union, overload
 
 from pydantic import Field, root_validator, validator
 from typing_extensions import Annotated, Literal
@@ -241,6 +241,22 @@ class ProfileParams(CoreModel):
         Field(description="Run termination policy based on utilization"),
     ] = None
 
+    # # Deprecated and unused. Left for compatibility with 0.18 clients.
+    pool_name: Annotated[Optional[str], Field(exclude=True)] = None
+    instance_name: Annotated[Optional[str], Field(exclude=True)] = None
+    retry_policy: Annotated[Optional[ProfileRetryPolicy], Field(exclude=True)] = None
+    termination_policy: Annotated[Optional[TerminationPolicy], Field(exclude=True)] = None
+    termination_idle_time: Annotated[Optional[Union[str, int]], Field(exclude=True)] = None
+
+    class Config:
+        @staticmethod
+        def schema_extra(schema: Dict[str, Any]) -> None:
+            del schema["properties"]["pool_name"]
+            del schema["properties"]["instance_name"]
+            del schema["properties"]["retry_policy"]
+            del schema["properties"]["termination_policy"]
+            del schema["properties"]["termination_idle_time"]
+
     _validate_max_duration = validator("max_duration", pre=True, allow_reuse=True)(
         parse_max_duration
     )
diff --git a/src/dstack/_internal/server/schemas/gateways.py b/src/dstack/_internal/server/schemas/gateways.py
index b94fcbb23..2ffc89143 100644
--- a/src/dstack/_internal/server/schemas/gateways.py
+++ b/src/dstack/_internal/server/schemas/gateways.py
@@ -1,11 +1,25 @@
-from typing import List
+from typing import Annotated, Any, Dict, List, Optional
 
+from pydantic import Field
+
+from dstack._internal.core.models.backends.base import BackendType
 from dstack._internal.core.models.common import CoreModel
 from dstack._internal.core.models.gateways import GatewayConfiguration
 
 
 class CreateGatewayRequest(CoreModel):
     configuration: GatewayConfiguration
+    # Deprecated and unused. Left for compatibility with 0.18 clients.
+    name: Annotated[Optional[str], Field(exclude=True)] = None
+    backend_type: Annotated[Optional[BackendType], Field(exclude=True)] = None
+    region: Annotated[Optional[str], Field(exclude=True)] = None
+
+    class Config:
+        @staticmethod
+        def schema_extra(schema: Dict[str, Any]) -> None:
+            del schema["properties"]["name"]
+            del schema["properties"]["backend_type"]
+            del schema["properties"]["region"]
 
 
 class GetGatewayRequest(CoreModel):