diff --git a/fyo/models/NumberSeries.ts b/fyo/models/NumberSeries.ts
index 661b516b..3b9f485f 100644
--- a/fyo/models/NumberSeries.ts
+++ b/fyo/models/NumberSeries.ts
@@ -1,11 +1,29 @@
 import { Doc } from 'fyo/model/doc';
-import { ReadOnlyMap } from 'fyo/model/types';
+import { ReadOnlyMap, ValidationMap } from 'fyo/model/types';
+import { ValidationError } from 'fyo/utils/errors';
+
+const invalidNumberSeries = /[/\=\?\&\%]/;
 
 function getPaddedName(prefix: string, next: number, padZeros: number): string {
   return prefix + next.toString().padStart(padZeros ?? 4, '0');
 }
 
 export default class NumberSeries extends Doc {
+  validations: ValidationMap = {
+    name: (value) => {
+      if (typeof value !== 'string') {
+        return;
+      }
+
+      if (invalidNumberSeries.test(value)) {
+        throw new ValidationError(
+          this.fyo
+            .t`The following characters cannot be used ${'/, ?, &, =, %'} in a Number Series name.`
+        );
+      }
+    },
+  };
+
   setCurrent() {
     let current = this.get('current') as number | null;
 
diff --git a/src/components/Controls/Barcode.vue b/src/components/Controls/Barcode.vue
index 219f0141..3bb5af64 100644
--- a/src/components/Controls/Barcode.vue
+++ b/src/components/Controls/Barcode.vue
@@ -35,9 +35,11 @@ export default defineComponent({
     return {
       timerId: null,
       barcode: '',
+      cooldown: '',
     } as {
-      timerId: null | ReturnType<typeof setInterval>;
+      timerId: null | ReturnType<typeof setTimeout>;
       barcode: string;
+      cooldown: string;
     };
   },
   mounted() {
@@ -64,6 +66,17 @@ export default defineComponent({
         return this.error(this.t`Invalid barcode value ${barcode}.`);
       }
 
+      /**
+       * Between two entries of the same item, this adds
+       * a cooldown period of 100ms. This is to prevent
+       * double entry.
+       */
+      if (this.cooldown === barcode) {
+        return;
+      }
+      this.cooldown = barcode;
+      setTimeout(() => (this.cooldown = ''), 100);
+
       const items = (await this.fyo.db.getAll('Item', {
         filters: { barcode },
         fields: ['name'],
@@ -97,12 +110,10 @@ export default defineComponent({
         return await this.setItemFromBarcode();
       }
 
-      if (this.timerId !== null) {
-        clearInterval(this.timerId);
-      }
+      this.clearInterval();
 
       this.barcode += key;
-      this.timerId = setInterval(async () => {
+      this.timerId = setTimeout(async () => {
         await this.setItemFromBarcode();
         this.barcode = '';
       }, 20);
@@ -115,9 +126,15 @@ export default defineComponent({
       await this.selectItem(this.barcode);
 
       this.barcode = '';
-      if (this.timerId !== null) {
-        clearInterval(this.timerId);
+      this.clearInterval();
+    },
+    clearInterval() {
+      if (this.timerId === null) {
+        return;
       }
+
+      clearInterval(this.timerId);
+      this.timerId = null;
     },
     error(message: string) {
       showToast({ type: 'error', message });
diff --git a/src/components/Controls/Link.vue b/src/components/Controls/Link.vue
index 03a0683f..f8e40c12 100644
--- a/src/components/Controls/Link.vue
+++ b/src/components/Controls/Link.vue
@@ -131,7 +131,8 @@ export default {
     },
     async openNewDoc() {
       const schemaName = this.df.target;
-      const name = this.linkValue;
+      const name =
+        this.linkValue || fyo.doc.getTemporaryName(fyo.schemaMap[schemaName]);
       const filters = await this.getCreateFilters();
       const { openQuickEdit } = await import('src/utils/ui');