diff --git a/frontend/src/components/account/BulkEditAccountModal.vue b/frontend/src/components/account/BulkEditAccountModal.vue
index 12ca5a70..36bc94b1 100644
--- a/frontend/src/components/account/BulkEditAccountModal.vue
+++ b/frontend/src/components/account/BulkEditAccountModal.vue
@@ -496,6 +496,7 @@
             class="input"
             :class="!enableConcurrency && 'cursor-not-allowed opacity-50'"
             aria-labelledby="bulk-edit-concurrency-label"
+            @input="if (concurrency < 1) concurrency = 1"
           />
         </div>
         <div>
@@ -524,6 +525,7 @@
             class="input"
             :class="!enableLoadFactor && 'cursor-not-allowed opacity-50'"
             aria-labelledby="bulk-edit-load-factor-label"
+            @input="if (loadFactor != null && loadFactor < 1) loadFactor = null"
           />
           <p class="input-hint">{{ t('admin.accounts.loadFactorHint') }}</p>
         </div>
diff --git a/frontend/src/components/account/CreateAccountModal.vue b/frontend/src/components/account/CreateAccountModal.vue
index c5420ca4..e5e44508 100644
--- a/frontend/src/components/account/CreateAccountModal.vue
+++ b/frontend/src/components/account/CreateAccountModal.vue
@@ -1752,12 +1752,14 @@
       <div class="grid grid-cols-2 gap-4 lg:grid-cols-4">
         <div>
           <label class="input-label">{{ t('admin.accounts.concurrency') }}</label>
-          <input v-model.number="form.concurrency" type="number" min="1" class="input" />
+          <input v-model.number="form.concurrency" type="number" min="1" class="input"
+            @input="if (form.concurrency < 1) form.concurrency = 1" />
         </div>
         <div>
           <label class="input-label">{{ t('admin.accounts.loadFactor') }}</label>
           <input v-model.number="form.load_factor" type="number" min="1"
-            class="input" :placeholder="String(form.concurrency || 1)" />
+            class="input" :placeholder="String(form.concurrency || 1)"
+            @input="if (form.load_factor != null && form.load_factor < 1) form.load_factor = null" />
           <p class="input-hint">{{ t('admin.accounts.loadFactorHint') }}</p>
         </div>
         <div>
diff --git a/frontend/src/components/account/EditAccountModal.vue b/frontend/src/components/account/EditAccountModal.vue
index b516c4b3..b170169a 100644
--- a/frontend/src/components/account/EditAccountModal.vue
+++ b/frontend/src/components/account/EditAccountModal.vue
@@ -653,12 +653,14 @@
       <div class="grid grid-cols-2 gap-4 lg:grid-cols-4">
         <div>
           <label class="input-label">{{ t('admin.accounts.concurrency') }}</label>
-          <input v-model.number="form.concurrency" type="number" min="1" class="input" />
+          <input v-model.number="form.concurrency" type="number" min="1" class="input"
+            @input="if (form.concurrency < 1) form.concurrency = 1" />
         </div>
         <div>
           <label class="input-label">{{ t('admin.accounts.loadFactor') }}</label>
           <input v-model.number="form.load_factor" type="number" min="1"
-            class="input" :placeholder="String(form.concurrency || 1)" />
+            class="input" :placeholder="String(form.concurrency || 1)"
+            @input="if (form.load_factor != null && form.load_factor < 1) form.load_factor = null" />
           <p class="input-hint">{{ t('admin.accounts.loadFactorHint') }}</p>
         </div>
         <div>