diff --git a/src/app/api/upgrade-config/__tests__/route.test.ts b/src/app/api/upgrade-config/__tests__/route.test.ts
index 73d359c..5a3aaf9 100644
--- a/src/app/api/upgrade-config/__tests__/route.test.ts
+++ b/src/app/api/upgrade-config/__tests__/route.test.ts
@@ -69,33 +69,15 @@ describe('GET /api/upgrade-config', () => {
   });
 
   describe('path traversal prevention', () => {
-    it('returns 400 when network contains ".."', async () => {
-      const res = await GET(createRequest({ network: '..', upgradeId: 'test' }));
-      expect(res.status).toBe(400);
-      const body = await res.json();
-      expect(body.error).toMatch(/invalid network/i);
-    });
-
-    it('returns 400 when network contains "/"', async () => {
-      const res = await GET(createRequest({ network: 'foo/bar', upgradeId: 'test' }));
-      expect(res.status).toBe(400);
-      const body = await res.json();
-      expect(body.error).toMatch(/invalid network/i);
-    });
-
-    it('returns 400 when network contains spaces', async () => {
-      const res = await GET(createRequest({ network: 'main net', upgradeId: 'test' }));
-      expect(res.status).toBe(400);
-      const body = await res.json();
-      expect(body.error).toMatch(/invalid network/i);
-    });
-
-    it('returns 400 when network contains "." (single dot)', async () => {
-      const res = await GET(createRequest({ network: '.', upgradeId: 'test' }));
-      expect(res.status).toBe(400);
-      const body = await res.json();
-      expect(body.error).toMatch(/invalid network/i);
-    });
+    it.each(['..', 'foo/bar', 'main net', '.'])(
+      'returns 400 when network is "%s"',
+      async network => {
+        const res = await GET(createRequest({ network, upgradeId: 'test' }));
+        expect(res.status).toBe(400);
+        const body = await res.json();
+        expect(body.error).toMatch(/invalid network/i);
+      }
+    );
     it('returns 400 when upgradeId contains path separators', async () => {
       const res = await GET(createRequest({ network: 'mainnet', upgradeId: 'foo/bar' }));
       expect(res.status).toBe(400);
@@ -132,6 +114,24 @@ describe('GET /api/upgrade-config', () => {
       expect(body.configOptions).toEqual([
         { fileName: 'config1', displayName: 'Config1', ledgerId: 0 },
       ]);
+      expect(console.warn).toHaveBeenCalledWith(
+        'Failed to parse config1.json, using default ledgerId: 0'
+      );
+    });
+
+    it('returns the default config option when reading fails', async () => {
+      const error = new Error('Read failed');
+      mockReadFile.mockRejectedValue(error);
+      const res = await GET(createRequest({ network: 'mainnet', upgradeId: 'test' }));
+      expect(res.status).toBe(200);
+      const body = await res.json();
+      expect(body.configOptions).toEqual([
+        { fileName: 'config1', displayName: 'Config1', ledgerId: 0 },
+      ]);
+      expect(console.warn).toHaveBeenCalledWith(
+        'Error reading config1.json, using default ledgerId: 0',
+        error
+      );
     });
 
     it('returns 200 with empty array on ENOENT', async () => {
diff --git a/src/app/api/upgrade-config/route.ts b/src/app/api/upgrade-config/route.ts
index 9c13b14..ebd72cd 100644
--- a/src/app/api/upgrade-config/route.ts
+++ b/src/app/api/upgrade-config/route.ts
@@ -64,28 +64,21 @@ export async function GET(req: NextRequest) {
         const displayName = toDisplayName(baseName);
         const filePath = path.join(validationsPath, configFile);
 
+        let ledgerId = 0;
         try {
           const configContent = await fs.readFile(filePath, 'utf-8');
           const parsedConfig = parseFromString(configContent);
 
           if (parsedConfig.result.success && 'config' in parsedConfig) {
-            return {
-              fileName: baseName,
-              displayName,
-              ledgerId: parsedConfig.config.ledgerId,
-            };
+            ledgerId = parsedConfig.config.ledgerId;
+          } else {
+            console.warn(`Failed to parse ${configFile}, using default ledgerId: 0`);
           }
-
-          console.warn(`Failed to parse ${configFile}, using default ledgerId: 0`);
         } catch (error) {
           console.warn(`Error reading ${configFile}, using default ledgerId: 0`, error);
         }
 
-        return {
-          fileName: baseName,
-          displayName,
-          ledgerId: 0,
-        };
+        return { fileName: baseName, displayName, ledgerId };
       })
     );
 
diff --git a/src/app/api/upgrades/__tests__/route.test.ts b/src/app/api/upgrades/__tests__/route.test.ts
index a223c86..707e1b1 100644
--- a/src/app/api/upgrades/__tests__/route.test.ts
+++ b/src/app/api/upgrades/__tests__/route.test.ts
@@ -22,21 +22,6 @@ function createRequest(params: Record<string, string>): NextRequest {
 describe('GET /api/upgrades', () => {
   beforeEach(() => {
     jest.clearAllMocks();
-    mockGetUpgradeOptions.mockImplementation((network: NetworkType) => {
-      if (network === NetworkType.Zeronet) {
-        return [
-          {
-            id: '2025-08-01-upgrade-qux',
-            name: 'Upgrade Qux',
-            description: 'Zeronet upgrade',
-            date: '2025-08-01',
-            network: NetworkType.Zeronet,
-            status: TaskStatus.ReadyToSign,
-          },
-        ];
-      }
-      return [];
-    });
   });
 
   afterEach(() => {
@@ -82,6 +67,7 @@ describe('GET /api/upgrades', () => {
     });
 
     const res = GET(createRequest({ readyToSign: 'true' }));
+    expect(res.status).toBe(200);
     const body = await res.json();
 
     expect(body.map((t: Upgrade) => t.id)).toEqual([
@@ -90,13 +76,13 @@ describe('GET /api/upgrades', () => {
     ]);
   });
 
-  it('returns only ready-to-sign tasks tagged with the fetched network', async () => {
+  it('returns only ready-to-sign tasks', async () => {
     const readyTask: Upgrade = {
       id: '2025-08-01-upgrade-ready',
       name: 'Ready',
       description: '',
       date: '2025-08-01',
-      network: NetworkType.Sepolia,
+      network: NetworkType.Mainnet,
       status: TaskStatus.ReadyToSign,
     };
     mockGetUpgradeOptions.mockImplementation((network: NetworkType) =>
@@ -110,23 +96,6 @@ describe('GET /api/upgrades', () => {
 
     const res = GET(createRequest({ readyToSign: 'true' }));
 
-    expect(await res.json()).toEqual([{ ...readyTask, network: NetworkType.Mainnet }]);
-  });
-
-  it('includes zeronet when aggregating ready-to-sign tasks', async () => {
-    const res = GET(createRequest({ readyToSign: 'true' }));
-
-    expect(res.status).toBe(200);
-
-    const body = await res.json();
-    expect(body).toEqual(
-      expect.arrayContaining([
-        expect.objectContaining({
-          id: '2025-08-01-upgrade-qux',
-          network: NetworkType.Zeronet,
-          status: TaskStatus.ReadyToSign,
-        }),
-      ])
-    );
+    expect(await res.json()).toEqual([readyTask]);
   });
 });
diff --git a/src/app/api/upgrades/route.ts b/src/app/api/upgrades/route.ts
index b2b90e9..59d6533 100644
--- a/src/app/api/upgrades/route.ts
+++ b/src/app/api/upgrades/route.ts
@@ -12,9 +12,7 @@ export function GET(req: NextRequest) {
 
   const allReadyToSignTasks = availableNetworks.flatMap(network => {
     const upgrades = getUpgradeOptions(network);
-    return upgrades
-      .filter(upgrade => upgrade.status === TaskStatus.ReadyToSign)
-      .map(upgrade => ({ ...upgrade, network }));
+    return upgrades.filter(upgrade => upgrade.status === TaskStatus.ReadyToSign);
   });
 
   // Sort by id (newest first) across all networks; per-network lists are sorted independently.