diff --git a/app/assets/javascripts/discourse/app/components/edit-category-settings.hbs b/app/assets/javascripts/discourse/app/components/edit-category-settings.hbs
index 27fe8267c80..647ce9c3fd5 100644
--- a/app/assets/javascripts/discourse/app/components/edit-category-settings.hbs
+++ b/app/assets/javascripts/discourse/app/components/edit-category-settings.hbs
@@ -153,7 +153,6 @@
         <RelativeTimePicker
           @id="category-default-slow-mode"
           @durationMinutes={{this.category.defaultSlowModeMinutes}}
-          @hiddenIntervals={{this.hiddenRelativeIntervals}}
           @onChange={{action "onDefaultSlowModeDurationChange"}}
         />
       </div>
diff --git a/app/assets/javascripts/discourse/app/components/relative-time-picker.js b/app/assets/javascripts/discourse/app/components/relative-time-picker.js
index cb23e50cadf..29e91b71e25 100644
--- a/app/assets/javascripts/discourse/app/components/relative-time-picker.js
+++ b/app/assets/javascripts/discourse/app/components/relative-time-picker.js
@@ -14,19 +14,19 @@ export default Component.extend({
 
   @on("init")
   cloneDuration() {
-    let mins = this.durationMinutes;
-    let hours = this.durationHours;
+    const usesHours = Object.hasOwn(this.attrs, "durationHours");
+    const usesMinutes = Object.hasOwn(this.attrs, "durationMinutes");
 
-    if (hours && mins) {
+    if (usesHours && usesMinutes) {
       throw new Error(
         "relative-time needs initial duration in hours OR minutes, both are not supported"
       );
     }
 
-    if (hours) {
-      this._setInitialDurationFromHours(hours);
+    if (usesHours) {
+      this._setInitialDurationFromHours(this.durationHours);
     } else {
-      this._setInitialDurationFromMinutes(mins);
+      this._setInitialDurationFromMinutes(this.durationMinutes);
     }
   },
 
@@ -47,7 +47,12 @@ export default Component.extend({
   },
 
   _setInitialDurationFromHours(hours) {
-    if (hours >= 8760) {
+    if (hours === null) {
+      this.setProperties({
+        duration: hours,
+        selectedInterval: "hours",
+      });
+    } else if (hours >= 8760) {
       this.setProperties({
         duration: this._roundedDuration(hours / 365 / 24),
         selectedInterval: "years",
diff --git a/app/assets/javascripts/discourse/tests/integration/components/relative-time-picker-test.js b/app/assets/javascripts/discourse/tests/integration/components/relative-time-picker-test.js
index 5cc16d0ec17..f34169e9d84 100644
--- a/app/assets/javascripts/discourse/tests/integration/components/relative-time-picker-test.js
+++ b/app/assets/javascripts/discourse/tests/integration/components/relative-time-picker-test.js
@@ -20,6 +20,14 @@ module("Integration | Component | relative-time-picker", function (hooks) {
     assert.strictEqual(prefilledDuration, "5");
   });
 
+  test("prefills and preselects null minutes", async function (assert) {
+    await render(hbs`<RelativeTimePicker @durationMinutes={{null}} />`);
+
+    const prefilledDuration = query(".relative-time-duration").value;
+    assert.strictEqual(this.subject.header().value(), "mins");
+    assert.strictEqual(prefilledDuration, "");
+  });
+
   test("prefills and preselects hours based on translated minutes", async function (assert) {
     await render(hbs`<RelativeTimePicker @durationMinutes="90" />`);
 
@@ -60,6 +68,14 @@ module("Integration | Component | relative-time-picker", function (hooks) {
     assert.strictEqual(prefilledDuration, "5");
   });
 
+  test("prefills and preselects null hours", async function (assert) {
+    await render(hbs`<RelativeTimePicker @durationHours={{null}} />`);
+
+    const prefilledDuration = query(".relative-time-duration").value;
+    assert.strictEqual(this.subject.header().value(), "hours");
+    assert.strictEqual(prefilledDuration, "");
+  });
+
   test("prefills and preselects minutes based on translated hours", async function (assert) {
     await render(hbs`<RelativeTimePicker @durationHours="0.5" />`);