diff --git a/packages/frontend/src/crm/lexware/DealVouchersSection.tsx b/packages/frontend/src/crm/lexware/DealVouchersSection.tsx
index 3627587..01a1fff 100644
--- a/packages/frontend/src/crm/lexware/DealVouchersSection.tsx
+++ b/packages/frontend/src/crm/lexware/DealVouchersSection.tsx
@@ -182,11 +182,13 @@ export function DealVouchersSection({
   const { isModuleEnabled } = useCrmSettings();
   const [isLinkOpen, setLinkOpen] = useState(false);
 
-  // Hide entire section if Lexware module is disabled
-  if (!isModuleEnabled('lexware')) return null;
+  // All hooks must be called before any conditional return
   const { data, isLoading } = useDealVouchers(dealId);
   const unlinkMutation = useUnlinkVoucherFromDeal();
 
+  // Hide entire section if Lexware module is disabled
+  if (!isModuleEnabled('lexware')) return null;
+
   const dealVouchers: DealVoucher[] = data?.data ?? [];
   const linkedVoucherIds = new Set(dealVouchers.map((dv) => dv.voucher.id));
 
diff --git a/packages/frontend/src/crm/lexware/LexwareSection.tsx b/packages/frontend/src/crm/lexware/LexwareSection.tsx
index e8ac3da..fc07d05 100644
--- a/packages/frontend/src/crm/lexware/LexwareSection.tsx
+++ b/packages/frontend/src/crm/lexware/LexwareSection.tsx
@@ -144,12 +144,10 @@ export function LexwareSection({
     VoucherType | ''
   >('');
 
-  // Hide entire section if Lexware module is disabled
-  if (!isModuleEnabled('lexware')) return null;
-
   const isLinked = !!lexwareContactId;
+  const lexwareEnabled = isModuleEnabled('lexware');
 
-  // Mutations
+  // Mutations — all hooks must be called before any conditional return
   const linkCompany = useLinkLexwareCompany();
   const linkContact = useLinkLexwareContact();
   const unlinkCompany = useUnlinkLexwareCompany();
@@ -159,19 +157,26 @@ export function LexwareSection({
   const refreshCompanyVouchers = useRefreshCompanyVouchers();
   const refreshContactVouchers = useRefreshContactVouchers();
 
-  // Vouchers (only fetch when linked)
+  // Vouchers (only fetch when linked AND module enabled)
   const vouchersParams = voucherTypeFilter
     ? { voucherType: voucherTypeFilter as VoucherType, pageSize: 50 }
     : { pageSize: 50 };
   const companyVouchers = useCompanyVouchers(
     entityType === 'company' ? entityId : '',
-    entityType === 'company' && isLinked ? vouchersParams : undefined,
+    entityType === 'company' && isLinked && lexwareEnabled
+      ? vouchersParams
+      : undefined,
   );
   const contactVouchers = useContactVouchers(
     entityType === 'contact' ? entityId : '',
-    entityType === 'contact' && isLinked ? vouchersParams : undefined,
+    entityType === 'contact' && isLinked && lexwareEnabled
+      ? vouchersParams
+      : undefined,
   );
 
+  // Hide entire section if Lexware module is disabled
+  if (!lexwareEnabled) return null;
+
   const vouchersData =
     entityType === 'company' ? companyVouchers : contactVouchers;
   const vouchers: LexwareVoucher[] = vouchersData.data?.data ?? [];