diff --git a/actors.mjs b/actors.mjs
index cddf7d1..da4f8b1 100644
--- a/actors.mjs
+++ b/actors.mjs
@@ -188,7 +188,11 @@ export async function interpolateProfiles(actorIdsOrNames, context, options = {}
 	const transaction = await context.knex.transaction();
 
 	// clear existing interpolated data
-	const emptyProfile = Object.fromEntries(columns.filter((key) => !preservedKeys.includes(key)).map((key) => [key, null]));
+	const emptyProfile = {
+		...Object.fromEntries(columns.filter((key) => !preservedKeys.includes(key)).map((key) => [key, null])),
+		date_of_birth_precision: 'day',
+		date_of_death_precision: 'day',
+	};
 
 	await context.knex('actors')
 		.modify((modifyBuilder) => {