diff --git a/packages/dashboard-core-plugins/src/panels/IrisGridPanel.tsx b/packages/dashboard-core-plugins/src/panels/IrisGridPanel.tsx
index 9805027072..0f15937755 100644
--- a/packages/dashboard-core-plugins/src/panels/IrisGridPanel.tsx
+++ b/packages/dashboard-core-plugins/src/panels/IrisGridPanel.tsx
@@ -44,8 +44,6 @@ import {
   IrisGridContextMenuData,
   IrisGridTableModel,
   PartitionConfig,
-  isPartitionedGridModel,
-  PartitionedGridModel,
 } from '@deephaven/iris-grid';
 import {
   AdvancedFilterOptions,
@@ -583,7 +581,6 @@ export class IrisGridPanel extends PureComponent<
         customColumns,
         selectDistinctColumns = [],
         rollupConfig,
-        partitionConfig,
       } = { ...irisGridState, ...irisGridStateOverrides };
 
       if (customColumns.length > 0) {
@@ -613,13 +610,6 @@ export class IrisGridPanel extends PureComponent<
           m.selectDistinctColumns = selectDistinctColumns;
         });
       }
-
-      if (partitionConfig != null && isPartitionedGridModel(model)) {
-        modelQueue.push(m => {
-          // eslint-disable-next-line no-param-reassign
-          (m as PartitionedGridModel).partitionConfig = partitionConfig;
-        });
-      }
     }
 
     this.setState({ model, modelQueue });
diff --git a/packages/iris-grid/src/IrisGrid.tsx b/packages/iris-grid/src/IrisGrid.tsx
index cd1537bda2..4d7c7a33b2 100644
--- a/packages/iris-grid/src/IrisGrid.tsx
+++ b/packages/iris-grid/src/IrisGrid.tsx
@@ -841,13 +841,10 @@ export class IrisGrid extends Component<IrisGridProps, IrisGridState> {
   }
 
   componentDidMount(): void {
-    const { model, partitions, partitionConfig } = this.props;
+    const { model, partitions } = this.props;
     try {
       if (isPartitionedGridModel(model) && model.isPartitionRequired) {
-        log.log('Partition mounting', partitions, partitionConfig);
-        if (partitionConfig) {
-          model.partitionConfig = partitionConfig;
-        } else if (partitions.length) {
+        if (partitions.length) {
           model.partitionConfig = { partitions, mode: 'partition' };
         }
         this.setState({ isSelectingPartition: true }, () => {
diff --git a/packages/iris-grid/src/IrisGridPartitionSelector.test.tsx b/packages/iris-grid/src/IrisGridPartitionSelector.test.tsx
index b9a46e92eb..5a008580d2 100644
--- a/packages/iris-grid/src/IrisGridPartitionSelector.test.tsx
+++ b/packages/iris-grid/src/IrisGridPartitionSelector.test.tsx
@@ -3,6 +3,7 @@ import { render, fireEvent } from '@testing-library/react';
 import dh from '@deephaven/jsapi-shim';
 import IrisGridPartitionSelector from './IrisGridPartitionSelector';
 import IrisGridTestUtils from './IrisGridTestUtils';
+import { PartitionConfig } from './PartitionedGridModel';
 
 function makeIrisGridPartitionSelector(
   table = new IrisGridTestUtils(dh).makeTable(),
@@ -10,7 +11,8 @@ function makeIrisGridPartitionSelector(
   onChange = jest.fn(),
   onMerge = jest.fn(),
   onKeyTable = jest.fn(),
-  getFormattedString = jest.fn(value => `${value}`)
+  getFormattedString = jest.fn(value => `${value}`),
+  partitionConfig = { partitions: [], mode: 'merged' }
 ) {
   const tablePromise = Promise.resolve(table);
   return render(
@@ -22,6 +24,7 @@ function makeIrisGridPartitionSelector(
       onChange={onChange}
       onMerge={onMerge}
       onKeyTable={onKeyTable}
+      partitionConfig={partitionConfig as PartitionConfig}
     />
   );
 }
diff --git a/packages/iris-grid/src/IrisGridProxyModel.ts b/packages/iris-grid/src/IrisGridProxyModel.ts
index 8ff33f100c..68eb67beff 100644
--- a/packages/iris-grid/src/IrisGridProxyModel.ts
+++ b/packages/iris-grid/src/IrisGridProxyModel.ts
@@ -543,10 +543,7 @@ class IrisGridProxyModel extends IrisGridModel implements PartitionedGridModel {
       this.setNextModel(
         tablePromise.then(table => makeModel(this.dh, table, this.formatter))
       );
-    } else if (
-      isIrisGridTableModelTemplate(this.originalModel) &&
-      this.model !== this.originalModel
-    ) {
+    } else if (isIrisGridTableModelTemplate(this.originalModel)) {
       this.setNextModel(Promise.resolve(this.originalModel));
     }
   }
diff --git a/packages/iris-grid/src/IrisGridTableModel.ts b/packages/iris-grid/src/IrisGridTableModel.ts
index 427b5a2ab6..94968ce696 100644
--- a/packages/iris-grid/src/IrisGridTableModel.ts
+++ b/packages/iris-grid/src/IrisGridTableModel.ts
@@ -228,7 +228,7 @@ class IrisGridTableModel
   }
 
   set partitionConfig(partitionConfig: PartitionConfig) {
-    log.log('setting partition', partitionConfig);
+    log.debug('setting partition', partitionConfig);
     const { partitions, mode } = partitionConfig;
     const partitionFilters = [];
 
diff --git a/packages/iris-grid/src/IrisGridUtils.test.ts b/packages/iris-grid/src/IrisGridUtils.test.ts
index a9507c8952..d332f1c24e 100644
--- a/packages/iris-grid/src/IrisGridUtils.test.ts
+++ b/packages/iris-grid/src/IrisGridUtils.test.ts
@@ -646,7 +646,6 @@ describe('dehydration methods', () => {
       IrisGridUtils.dehydrateIrisGridPanelState(irisGridTestUtils.makeModel(), {
         isSelectingPartition: false,
         partitions: [],
-        partitionColumns: [],
         advancedSettings: new Map(),
       }),
     ],
@@ -676,55 +675,11 @@ describe('hydration methods', () => {
   );
 
   it.each([
-    [
-      'hydrateIrisGridPanelStateV1',
-      {
-        isSelectingPartition: false,
-        partition: null,
-        partitionColumn: 'INVALID',
-        advancedSettings: [],
-      },
-    ],
-    [
-      'hydrateIrisGridPanelStateV2',
-      {
-        isSelectingPartition: false,
-        partitions: [null],
-        partitionColumns: ['INVALID'],
-        advancedSettings: [],
-      },
-    ],
-  ])('%s invalid column error', (_label, panelState) => {
-    expect(() =>
-      IrisGridUtils.hydrateIrisGridPanelState(model, panelState)
-    ).toThrow('Invalid partition column INVALID');
-  });
-
-  it.each([
-    [
-      'hydrateIrisGridPanelStateV1 null partition column',
-      {
-        isSelectingPartition: false,
-        partition: null,
-        partitionColumn: null,
-        advancedSettings: [],
-      },
-    ],
     [
       'hydrateIrisGridPanelStateV1 null partition',
       {
         isSelectingPartition: false,
         partition: null,
-        partitionColumn: 'name_0',
-        advancedSettings: [],
-      },
-    ],
-    [
-      'hydrateIrisGridPanelStateV1 unselected partition',
-      {
-        isSelectingPartition: false,
-        partition: 'a',
-        partitionColumn: 'name_0',
         advancedSettings: [],
       },
     ],
@@ -733,7 +688,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: true,
         partition: 'a',
-        partitionColumn: 'name_0',
         advancedSettings: [],
       },
     ],
@@ -742,7 +696,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: false,
         partitions: [],
-        partitionColumns: [],
         advancedSettings: [],
       },
     ],
@@ -751,7 +704,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: true,
         partitions: [null, null],
-        partitionColumns: ['name_0', 'name_1'],
         advancedSettings: [],
       },
     ],
@@ -760,7 +712,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: true,
         partitions: ['a', 'b'],
-        partitionColumns: ['name_0', 'name_1'],
         advancedSettings: [],
       },
     ],
@@ -769,7 +720,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: true,
         partitions: [null, 'b', null],
-        partitionColumns: ['name_0', 'name_1', 'name_2'],
         advancedSettings: [],
       },
     ],
@@ -778,7 +728,6 @@ describe('hydration methods', () => {
       {
         isSelectingPartition: true,
         partitions: ['a', null, 'b'],
-        partitionColumns: ['name_0', 'name_1', 'name_2'],
         advancedSettings: [],
       },
     ],
@@ -787,18 +736,8 @@ describe('hydration methods', () => {
     expect(result.isSelectingPartition).toBe(panelState.isSelectingPartition);
     if (isPanelStateV1(panelState)) {
       expect(result.partitions).toEqual([panelState.partition]);
-      if (panelState.partitionColumn !== null) {
-        expect(result.partitionColumns[0].name).toBe(
-          panelState.partitionColumn
-        );
-      } else {
-        expect(result.partitionColumns).toEqual([]);
-      }
     } else {
       expect(result.partitions).toEqual(panelState.partitions);
-      panelState.partitionColumns.forEach((partition, index) => {
-        expect(result.partitionColumns[index].name === partition).toBeTruthy();
-      });
     }
   });
 });