diff --git a/litellm/__init__.py b/litellm/__init__.py
index 1a7e29191d1..ac2289b4319 100644
--- a/litellm/__init__.py
+++ b/litellm/__init__.py
@@ -167,6 +167,14 @@ _custom_logger_compatible_callbacks_literal = Literal[
 cold_storage_custom_logger: Optional[_custom_logger_compatible_callbacks_literal] = None
 logged_real_time_event_types: Optional[Union[List[str], Literal["*"]]] = None
 _known_custom_logger_compatible_callbacks: List = list(get_args(_custom_logger_compatible_callbacks_literal))
+# Callback names that must never be read as a model-name prefix. The router treats any
+# entry in the callback list as a prompt-management provider when it appears before the
+# "/" of a model string, so a callback named for an ordinary word would silently reserve
+# that prefix product-wide and break existing deployments that already use it.
+_CALLBACKS_NOT_USABLE_AS_MODEL_PREFIX: Final = frozenset({"generic"})
+_known_prompt_management_prefixes: Final = frozenset(
+    name for name in _known_custom_logger_compatible_callbacks if name not in _CALLBACKS_NOT_USABLE_AS_MODEL_PREFIX
+)
 callbacks: List[
     Union[Callable, _custom_logger_compatible_callbacks_literal, "CustomLogger"]  # CustomLogger is lazy-loaded
 ] = []
diff --git a/litellm/router.py b/litellm/router.py
index 8917ef60e36..366b7b1ba88 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -3734,7 +3734,7 @@ class Router:
             return False
 
         split_litellm_model: Final = litellm_model.split("/")[0]
-        return split_litellm_model in litellm._known_custom_logger_compatible_callbacks
+        return split_litellm_model in litellm._known_prompt_management_prefixes
 
     async def _prompt_management_factory(
         self,
@@ -8181,7 +8181,7 @@ class Router:
 
         if "/" in litellm_model:
             split_litellm_model: Final = litellm_model.split("/")[0]
-            if split_litellm_model in litellm._known_custom_logger_compatible_callbacks:
+            if split_litellm_model in litellm._known_prompt_management_prefixes:
                 is_prompt_management_model = True
 
         if is_prompt_management_model: