diff --git a/src/ssn/parsePatchmanifest.ts b/src/ssn/parsePatchmanifest.ts
index a614a53..baef51b 100644
--- a/src/ssn/parsePatchmanifest.ts
+++ b/src/ssn/parsePatchmanifest.ts
@@ -22,7 +22,9 @@ export default function parsePatchManifest(manifestFile: any): any {
   ReleaseUpdatePaths.elements.forEach((ReleaseUpdatePath: any) => {
     const from = ReleaseUpdatePath.elements[0].elements[0].text;
     const to = ReleaseUpdatePath.elements[1].elements[0].text;
-    out.releases[from].to.push(to);
+    if (from !== '-1') {
+      out.releases[from].to.push(to);
+    }
     out.releases[to].from.push(from);
   });