diff --git a/packages/builder/src/builderStore/store/backend.js b/packages/builder/src/builderStore/store/backend.js
index f48b561ef0..3cdabf1ed5 100644
--- a/packages/builder/src/builderStore/store/backend.js
+++ b/packages/builder/src/builderStore/store/backend.js
@@ -1,4 +1,4 @@
-import { writable } from "svelte/store"
+import { writable, get } from "svelte/store"
 import { cloneDeep } from "lodash/fp"
 import api from "../api"
 
@@ -62,16 +62,30 @@ export const getBackendUiStore = () => {
         }),
       save: async table => {
         const updatedTable = cloneDeep(table)
+        const oldTable = get(store).tables.filter(t => t._id === table._id)[0]
 
+        const fieldNames = []
         // update any renamed schema keys to reflect their names
-        for (let key in updatedTable.schema) {
+        for (let key of Object.keys(updatedTable.schema)) {
+          // if field name has been seen before remove it
+          if (fieldNames.indexOf(key.toLowerCase()) !== -1) {
+            delete updatedTable.schema[key]
+            continue
+          }
           const field = updatedTable.schema[key]
+          const oldField = oldTable?.schema[key]
+          // if the type has changed then revert back to the old field
+          if (oldField != null && oldField.type !== field.type) {
+            updatedTable.schema[key] = oldField
+          }
           // field has been renamed
           if (field.name && field.name !== key) {
             updatedTable.schema[field.name] = field
             updatedTable._rename = { old: key, updated: field.name }
             delete updatedTable.schema[key]
           }
+          // finally record this field has been used
+          fieldNames.push(key.toLowerCase())
         }
 
         const SAVE_TABLE_URL = `/api/tables`
diff --git a/packages/builder/src/components/backend/DataTable/Table.svelte b/packages/builder/src/components/backend/DataTable/Table.svelte
index 4c0dc06d39..8354b464c0 100644
--- a/packages/builder/src/components/backend/DataTable/Table.svelte
+++ b/packages/builder/src/components/backend/DataTable/Table.svelte
@@ -132,7 +132,6 @@
     font-size: 24px;
     font-weight: 600;
     text-rendering: optimizeLegibility;
-    text-transform: capitalize;
     margin-top: 0;
     display: flex;
     flex-direction: row;
diff --git a/packages/builder/src/components/backend/DataTable/popovers/ColumnPopover.svelte b/packages/builder/src/components/backend/DataTable/popovers/ColumnPopover.svelte
index 2857b651c3..f844cdefae 100644
--- a/packages/builder/src/components/backend/DataTable/popovers/ColumnPopover.svelte
+++ b/packages/builder/src/components/backend/DataTable/popovers/ColumnPopover.svelte
@@ -110,9 +110,6 @@
     align-items: center;
     gap: var(--spacing-xs);
   }
-  .container span {
-    text-transform: capitalize;
-  }
 
   h5 {
     padding: var(--spacing-xl) 0 0 var(--spacing-xl);
diff --git a/packages/server/src/api/controllers/table.js b/packages/server/src/api/controllers/table.js
index 82f981e3e6..3030274016 100644
--- a/packages/server/src/api/controllers/table.js
+++ b/packages/server/src/api/controllers/table.js
@@ -41,6 +41,18 @@ exports.save = async function(ctx) {
     oldTable = await db.get(ctx.request.body._id)
   }
 
+  // make sure that types don't change of a column, have to remove
+  // the column if you want to change the type
+  if (oldTable && oldTable.schema) {
+    for (let propKey of Object.keys(tableToSave.schema)) {
+      let column = tableToSave.schema[propKey]
+      let oldColumn = oldTable.schema[propKey]
+      if (oldColumn && oldColumn.type !== column.type) {
+        ctx.throw(400, "Cannot change the type of a column")
+      }
+    }
+  }
+
   // Don't rename if the name is the same
   let { _rename } = tableToSave
   if (_rename && _rename.old === _rename.updated) {
@@ -50,9 +62,9 @@ exports.save = async function(ctx) {
 
   // rename row fields when table column is renamed
   if (_rename && tableToSave.schema[_rename.updated].type === "link") {
-    throw "Cannot rename a linked field."
+    ctx.throw(400, "Cannot rename a linked column.")
   } else if (_rename && tableToSave.primaryDisplay === _rename.old) {
-    throw "Cannot rename the display column."
+    ctx.throw(400, "Cannot rename the display column.")
   } else if (_rename) {
     const rows = await db.allDocs(
       getRowParams(tableToSave._id, null, {