diff --git a/lib/algorithm.js b/lib/algorithm.js
index 93c29a5..c8c83db 100644
--- a/lib/algorithm.js
+++ b/lib/algorithm.js
@@ -10,6 +10,7 @@ const { EMPTY_RANGE, isEmptyRange, estimateMsgCount } = require('./range')
  * @typedef {ReturnType<import('pzp-dict').init>} PZPDict
  * @typedef {ReturnType<import('pzp-set').init>} PZPSet
  * @typedef {import('pzp-db/msg-v4').Msg} Msg
+ * @typedef {import('pzp-db/db-tangle')} DBTangle
  * @typedef {import('pzp-goals').Goal} Goal
  * @typedef {import('./range').Range} Range
  * @typedef {string} MsgID
@@ -314,12 +315,15 @@ class Algorithm {
    * @param {number} count
    */
   async pruneNewest(rootID, count) {
+    /** @type {DBTangle | null} */
     const tangle = await p(this.#peer.db.getTangle)(rootID)
     if (!tangle) return
     const sorted = tangle.topoSort()
     if (sorted.length <= count) return
     const msgID = sorted[sorted.length - count] // New "oldest dataful msg"
-    const { deletables, erasables } = tangle.getDeletablesAndErasables(msgID)
+    const deletablesErasables = tangle.getDeletablesAndErasables(msgID)
+    if (!deletablesErasables) return
+    const { deletables, erasables } = deletablesErasables
     const del = p(this.#peer.db.del)
     const erase = p(this.#peer.db.erase)
     for (const msgID of deletables) {
diff --git a/package.json b/package.json
index cc0238c..fd86e5e 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "@types/node": "16.x",
     "c8": "7",
     "pzp-caps": "^1.0.0",
-    "pzp-db": "^1.0.1",
+    "pzp-db": "^1.0.4",
     "pzp-dict": "^1.0.0",
     "pzp-goals": "^1.0.0",
     "pzp-keypair": "^1.0.0",