diff --git a/python/lsst/alert/packet/bin/syncAllSchemasToRegistry.py b/python/lsst/alert/packet/bin/syncAllSchemasToRegistry.py
index 58bff66..c307121 100644
--- a/python/lsst/alert/packet/bin/syncAllSchemasToRegistry.py
+++ b/python/lsst/alert/packet/bin/syncAllSchemasToRegistry.py
@@ -50,21 +50,18 @@ def parse_args():
 def upload_schema(registry_url, subject, schema_registry):
     """Parse schema registry and upload all schemas.
     """
-    for version in schema_registry.known_versions:
-        schema = schema_registry.get_by_version(version)
-        numbers = re.findall(r'\d+', version)
-        numbers[1] = str(numbers[1]).zfill(2)
-        version_number = int(''.join(numbers))
+    for schema_id in schema_registry.known_ids:
+        schema = schema_registry.get_by_id(schema_id)
         normalized_schema = fastavro.schema.to_parsing_canonical_form(
             schema.definition)
-        confluent_schema = {"version": version_number,
-                            "id": version_number, "schema": normalized_schema}
+        confluent_schema = {"version": schema_id,
+                            "id": schema_id, "schema": normalized_schema}
         payload = json.dumps(confluent_schema)
         headers = {"Content-Type": "application/vnd.schemaregistry.v1+json"}
         url = f"{registry_url}/subjects/{subject}/versions"
         print(f"uploading schema to {url}")
         response = requests.post(url=url, data=payload, headers=headers)
-        # response.raise_for_status()
+        response.raise_for_status()
         print(f"done, status={response.status_code}")
         print(f"response text={response.text}")
 
@@ -78,7 +75,7 @@ def delete_schema(registry_url, subject):
     response = requests.get(url_schema_versions)
 
     # Schema registry must be empty to put it in import mode. If it exists,
-    # remove it and remkae the schema. If not, continue.
+    # remove it and remake the schema. If not, continue.
     if response.status_code == 200:
         print('The schema will be deleted and remade in import mode.')
         response = requests.delete(url_schemas)
diff --git a/python/lsst/alert/packet/schemaRegistry.py b/python/lsst/alert/packet/schemaRegistry.py
index 40516ae..672af94 100644
--- a/python/lsst/alert/packet/schemaRegistry.py
+++ b/python/lsst/alert/packet/schemaRegistry.py
@@ -24,6 +24,7 @@
 
 import json
 import os
+import re
 import zlib
 
 __all__ = ["SchemaRegistry"]
@@ -38,6 +39,7 @@ class SchemaRegistry:
     def __init__(self):
         self._version_to_id = {}
         self._id_to_schema = {}
+        self._ids = {}
 
     def register_schema(self, schema, version):
         """Register a new schema in the registry.
@@ -63,6 +65,7 @@ def register_schema(self, schema, version):
         """
         schema_id = self.calculate_id(schema)
         self._version_to_id[version] = schema_id
+        self._ids[schema_id] = schema_id
         self._id_to_schema[schema_id] = schema
         return schema_id
 
@@ -108,6 +111,17 @@ def known_versions(self):
         """
         return set(self._version_to_id)
 
+    @property
+    def known_ids(self):
+        """Return all the schema ids tracked by this registry.
+
+        Returns
+        -------
+        schemas : `set` of `int`
+            Set of schema ids.
+        """
+        return set(self._ids)
+
     @staticmethod
     def calculate_id(schema):
         """Calculate an ID for the given schema.
@@ -122,13 +136,13 @@ def calculate_id(schema):
         schema_id : `int`
             The calculated ID.
         """
-        # Significant risk of collisions with more than a few schemas;
-        # CRC32 is ok for prototyping but isn't sensible in production.
-        return zlib.crc32(json.dumps(schema.definition,
-                                     sort_keys=True).encode('utf-8'))
+        numbers = re.findall(r'\d+', schema.definition['name'])
+        numbers[1] = str(numbers[1]).zfill(2)
+        schema_id = int(''.join(numbers))
+        return schema_id
 
     @classmethod
-    def from_filesystem(cls, root=None, schema_root="lsst.v7_0.alert"):
+    def from_filesystem(cls, root=None, schema_root="lsst.v7_1.alert"):
         """Populate a schema registry based on the filesystem.
 
         Walk the directory tree from the root provided, locating files named