diff --git a/src/domain/sourceToBundleComparison.ts b/src/domain/sourceToBundleComparison.ts
index 9af88f6566..df6965c0f1 100644
--- a/src/domain/sourceToBundleComparison.ts
+++ b/src/domain/sourceToBundleComparison.ts
@@ -279,12 +279,12 @@ const classifyMapping = (
   if (topPathCandidates.length === 1) {
     const candidate = topPathCandidates[0];
     return {
-      status: "modified",
-      confidence: candidate?.confidence === "high" ? "high" : "medium",
+      status: "unknown",
+      confidence: "unknown",
       currentNodeIds:
         candidate === undefined ? [] : [candidate.current_node_id],
       limitations: [
-        "Location evidence links the source to the current node, but exact source bytes do not match or are unavailable.",
+        "Location evidence links the source to the current node, but comparable source digests are unavailable.",
       ],
     };
   }
diff --git a/tests/sourceToBundleComparison.test.ts b/tests/sourceToBundleComparison.test.ts
index 5d74ad07ba..5a0a254857 100644
--- a/tests/sourceToBundleComparison.test.ts
+++ b/tests/sourceToBundleComparison.test.ts
@@ -43,12 +43,12 @@ describe("historical source to bundle comparison", () => {
     ).not.toThrow();
     expect(first.summary).toEqual({
       unchanged: 1,
-      modified: 1,
+      modified: 0,
       removed: 1,
       split: 1,
       merged: 2,
       duplicated: 1,
-      unknown: 0,
+      unknown: 1,
     });
     expect(item(first, "src/unchanged.ts")).toMatchObject({
       status: "unchanged",
@@ -65,8 +65,8 @@ describe("historical source to bundle comparison", () => {
       ],
     });
     expect(item(first, "src/modified.ts")).toMatchObject({
-      status: "modified",
-      confidence: "high",
+      status: "unknown",
+      confidence: "unknown",
       candidates: [
         expect.objectContaining({
           signals: expect.arrayContaining([