diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c26baa..0c46d8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,6 @@ All notable changes to pyCOREPOS will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## v0.5.1 (2025-02-20)
-
-### Fix
-
-- add `Product.default_vendor_item` convenience property
-
 ## v0.5.0 (2025-02-01)
 
 ### Feat
diff --git a/corepos/db/office_op/model.py b/corepos/db/office_op/model.py
index 60ad478..e374d37 100644
--- a/corepos/db/office_op/model.py
+++ b/corepos/db/office_op/model.py
@@ -583,32 +583,6 @@ class Product(common.ProductBase, Base):
         creator=lambda lc: ProductLikeCode(like_code=lc),
     )
 
-    vendor_items = orm.relationship(
-        'VendorItem',
-        back_populates='product',
-        primaryjoin='VendorItem.upc == Product.upc',
-        foreign_keys='VendorItem.upc',
-        order_by='VendorItem.vendor_item_id',
-        doc="""
-        List of :class:`VendorItem` records for this product.
-        """)
-
-    @property
-    def default_vendor_item(self):
-        """
-        Returns the "default" vendor item record.  This will
-        correspond to the :attr:`default_vendor` if possible.
-
-        :rtype: :class:`VendorItem` or ``None``
-        """
-        if self.default_vendor:
-            for item in self.vendor_items:
-                if item.vendor_id == self.default_vendor.id:
-                    return item
-
-        if self.vendor_items:
-            return self.vendor_items[0]
-
     @property
     def full_description(self):
         fields = ['brand', 'description', 'size']
@@ -758,12 +732,17 @@ class VendorItem(Base):
     upc = sa.Column(sa.String(length=13), nullable=False)
     product = orm.relationship(
         Product,
-        back_populates='vendor_items',
         primaryjoin=Product.upc == upc,
         foreign_keys=[upc],
         doc="""
         Reference to the :class:`Product` to which this record applies.
-        """)
+        """,
+        backref=orm.backref(
+            'vendor_items',
+            order_by=vendor_item_id,
+            doc="""
+            List of :class:`VendorItem` records for this product.
+            """))
 
     brand = sa.Column(sa.String(length=50), nullable=True)
 
diff --git a/pyproject.toml b/pyproject.toml
index cf50f41..35eb3a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "pyCOREPOS"
-version = "0.5.1"
+version = "0.5.0"
 description = "Python Interface to CORE POS"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]