diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1220,7 +1220,7 @@
                 height = chainHeight - MIN_BLOCKS_TO_KEEP;
             }
 
-            PruneBlockFilesManual(height);
+            PruneBlockFilesManual(::ChainstateActive(), height);
             const CBlockIndex *block = ::ChainActive().Tip();
             CHECK_NONFATAL(block);
             while (block->pprev && (block->pprev->nStatus.hasData())) {
diff --git a/src/validation.h b/src/validation.h
--- a/src/validation.h
+++ b/src/validation.h
@@ -266,7 +266,8 @@
 void UnlinkPrunedFiles(const std::set<int> &setFilesToPrune);
 
 /** Prune block files up to a given height */
-void PruneBlockFilesManual(int nManualPruneHeight);
+void PruneBlockFilesManual(CChainState &active_chainstate,
+                           int nManualPruneHeight);
 
 /**
  * (try to) add transaction to memory pool
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -4628,10 +4628,13 @@
 }
 
 /* This function is called from the RPC code for pruneblockchain */
-void PruneBlockFilesManual(int nManualPruneHeight) {
+void PruneBlockFilesManual(CChainState &active_chainstate,
+                           int nManualPruneHeight) {
     BlockValidationState state;
     const CChainParams &chainparams = Params();
-    if (!::ChainstateActive().FlushStateToDisk(
+    assert(std::addressof(::ChainstateActive()) ==
+           std::addressof(active_chainstate));
+    if (active_chainstate.FlushStateToDisk(
             chainparams, state, FlushStateMode::NONE, nManualPruneHeight)) {
         LogPrintf("%s: failed to flush state (%s)\n", __func__,
                   state.ToString());