Fission-AI/OpenSpec · error · Error

The active delta for '${proposed.update.id}' changed during

Error message

The active delta for '${proposed.update.id}' changed during the fallback copy.

What it means

Error "The active delta for '${proposed.update.id}' changed during the fallback copy." thrown in Fission-AI/OpenSpec.

Source

Thrown at src/core/archive.ts:1963

                );
                if (
                  (await fingerprintPortableContent(archivedSource)) !==
                  proposed.sourceContentFingerprint
                ) {
                  throw new Error(
                    `The archived delta for '${proposed.update.id}' changed during the final move.`
                  );
                }
                if (stagedSource) {
                  const stagedDelta = path.join(
                    stagedSource,
                    path.relative(changeDir, proposed.update.source)
                  );
                  if (
                    (await fingerprintPortableContent(stagedDelta)) !==
                    proposed.sourceContentFingerprint
                  ) {
                    throw new Error(
                      `The active delta for '${proposed.update.id}' changed during the fallback copy.`
                    );
                  }
                }
              }
            };
            await moveDirectory(changeDir, archivePath, {
              verifyCopiedDestination: verifyArchivedDeltas,
            });
            changeArchived = true;
            await verifyArchivedDeltas();
            await finalizeRetirementBackups(specSnapshots, mainSpecsDir);
          } catch (error) {
            if (error instanceof MoveDestinationRetainedError) {
              changeArchived = true;
              try {
                await finalizeRetirementBackups(specSnapshots, mainSpecsDir);
              } catch (cleanupError) {

View on GitHub (pinned to 6926ccb18a)

When it happens

Trigger: Thrown at src/core/archive.ts:1963 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Fission-AI/OpenSpec@6926ccb18a (2026-08-25). Data as JSON: /api/errors/fc3877c7845337ad. Report an issue: GitHub.