diff --git a/src/tools/scene_tag_revision_fix.js b/src/tools/scene_tag_revision_fix.js
new file mode 100644
index 0000000..b8497d5
--- /dev/null
+++ b/src/tools/scene_tag_revision_fix.js
@@ -0,0 +1,80 @@
+import { MerkleJson } from 'merkle-json';
+
+import knex from '../knex.js';
+
+const mj = new MerkleJson();
+
+function curateTag(tag) {
+	if (Object.hasOwn(tag, 'actorId')) {
+		return {
+			id: tag.id,
+			actorId: tag.actorId,
+		};
+	}
+
+	if (typeof tag === 'number') {
+		return {
+			id: tag,
+			// can't restore actorId, don't set to null to hint at missing data
+		};
+	}
+
+	throw new Error(`Unrecognized tag delta: ${JSON.stringify(tag)}`);
+}
+
+async function init() {
+	const revisions = await knex('scenes_revisions');
+
+	// console.log(revisions);
+
+	const fixedRevisions = revisions.map((revision) => {
+		if (revision.base.tags.length === 0 && !revision.deltas.some((delta) => delta.key === 'tags')) {
+			return null;
+		}
+
+		const newDeltas = revision.deltas.map((delta) => {
+			if (delta.key !== 'tags') {
+				return delta;
+			}
+
+			return {
+				...delta,
+				value: delta.value.map((tag) => curateTag(tag)),
+			};
+		});
+
+		const newBase = {
+			...revision.base,
+			tags: revision.base.tags.map((tag) => curateTag(tag)),
+		};
+
+		return {
+			...revision,
+			deltas: newDeltas,
+			base: newBase,
+		};
+	}).filter(Boolean);
+
+	const entries = fixedRevisions.map((revision) => ({
+		id: revision.id,
+		base: JSON.stringify(revision.base),
+		deltas: JSON.stringify(revision.deltas),
+		hash: mj.hash({
+			base: revision.base,
+			deltas: revision.deltas,
+		}),
+	}));
+
+	console.log(entries);
+
+	await knex('scenes_revisions')
+		.insert(entries)
+		.onConflict('id')
+		.merge(['base', 'deltas', 'hash']);
+
+	console.log(`Fixed ${entries.length} revisions`);
+
+	await knex.destroy();
+}
+
+init();