diff --git a/changelog.md b/changelog.md
index 8b1df22..949786d 100644
--- a/changelog.md
+++ b/changelog.md
@@ -17,6 +17,12 @@ Major refactoring to allow partial/incremental standardisation of subnational ge
 - updated `poverty\_rate\_view` and VAT to include `admin1_name` from `admin1` table
 - made `reference\_period\_start` part of the primary key for `population\_vat` (originally omitted in error)
 
+## 0.8.17
+
+### Added
+
+- `operation` and additional primary keys to `idps` table
+
 ## 0.8.16
 
 ### Added
diff --git a/src/hapi_schema/db_idps.py b/src/hapi_schema/db_idps.py
index 884c5cf..a470be1 100644
--- a/src/hapi_schema/db_idps.py
+++ b/src/hapi_schema/db_idps.py
@@ -51,14 +51,15 @@ class DBIDPs(Base):
         build_enum_using_values(DTMAssessmentType), primary_key=True
     )
 
-    reporting_round: Mapped[int] = mapped_column(Integer, nullable=True)
+    reporting_round: Mapped[int] = mapped_column(Integer, primary_key=True)
+    operation: Mapped[str] = mapped_column(String, primary_key=True)
 
     population: Mapped[int] = mapped_column(
         Integer, nullable=False, index=True
     )
 
     reference_period_start: Mapped[datetime] = mapped_column(
-        DateTime, nullable=False, index=True
+        DateTime, primary_key=True
     )
 
     reference_period_end: Mapped[datetime] = mapped_column(
diff --git a/src/hapi_schema/db_views_as_tables.py b/src/hapi_schema/db_views_as_tables.py
index 1ac5555..4aefce1 100644
--- a/src/hapi_schema/db_views_as_tables.py
+++ b/src/hapi_schema/db_views_as_tables.py
@@ -301,7 +301,8 @@ class DBIDPsVAT(Base):
         String(512), primary_key=True
     )
     assessment_type: Mapped[str] = mapped_column(String(32), primary_key=True)
-    reporting_round: Mapped[int] = mapped_column(Integer, nullable=True)
+    reporting_round: Mapped[int] = mapped_column(Integer, primary_key=True)
+    operation: Mapped[str] = mapped_column(String, primary_key=True)
     population: Mapped[int] = mapped_column(Integer, index=True)
     reference_period_start: Mapped[datetime] = mapped_column(
         DateTime, primary_key=True
diff --git a/tests/sample_data/data_idps.py b/tests/sample_data/data_idps.py
index 62caee5..7f7b398 100644
--- a/tests/sample_data/data_idps.py
+++ b/tests/sample_data/data_idps.py
@@ -8,6 +8,7 @@
         provider_admin2_name="Distrito B",
         assessment_type="BA",
         reporting_round=18,
+        operation="Operation",
         population=25000,
         reference_period_start=datetime(2024, 1, 1),
         reference_period_end=datetime(2024, 12, 31),
diff --git a/tests/test_idps.py b/tests/test_idps.py
index 46077ed..f2f5f20 100644
--- a/tests/test_idps.py
+++ b/tests/test_idps.py
@@ -23,6 +23,7 @@ def test_idps_view(run_view_test):
             view_idps.c.provider_admin2_name == "Distrito B",
             view_idps.c.assessment_type == "BA",
             view_idps.c.reporting_round == 18,
+            view_idps.c.operation == "Operation",
             view_idps.c.population == 25000,
             view_idps.c.admin2_code == "FOO-001-XXX",
             view_idps.c.admin1_code == "FOO-001",
@@ -55,6 +56,7 @@ def base_parameters():
         provider_admin2_name="Distrito B",
         assessment_type="BA",
         reporting_round=18,
+        operation="operation",
         population=25000,
         reference_period_start=datetime(2020, 1, 1),
         reference_period_end=datetime(2020, 1, 2),
diff --git a/tests/test_views_as_tables.py b/tests/test_views_as_tables.py
index 8a73dfd..5a4e94c 100644
--- a/tests/test_views_as_tables.py
+++ b/tests/test_views_as_tables.py
@@ -235,6 +235,8 @@ def test_idps_vat(run_indexes_test, run_columns_test, run_primary_keys_test):
         "provider_admin1_name",
         "provider_admin2_name",
         "assessment_type",
+        "reporting_round",
+        "operation",
         "reference_period_start",
     ]
     expected_indexes = [