diff --git a/src/avalanche/peermanager.cpp b/src/avalanche/peermanager.cpp
--- a/src/avalanche/peermanager.cpp
+++ b/src/avalanche/peermanager.cpp
@@ -261,7 +261,18 @@
                 if (gArgs.GetBoolArg(
                         "-enableavalancheproofreplacement",
                         AVALANCHE_DEFAULT_PROOF_REPLACEMENT_ENABLED)) {
-                    if (validProofPool.addProofIfPreferred(proof)) {
+                    auto addProofStatus =
+                        validProofPool.addProofIfPreferred(proof);
+                    if (addProofStatus == ProofPool::AddProofStatus::SUCCEED ||
+                        addProofStatus ==
+                            ProofPool::AddProofStatus::DUPLICATED) {
+                        // Note on DUPLICATED: this should never happen because
+                        // it indicates a proof and others that conflict with it
+                        // are both in the valid pool at the same time. But if
+                        // this situation did arise, attempt to handle it
+                        // gracefully, moving the conflicting proofs into the
+                        // conflict pool.
+
                         // If we have overridden other proofs due to conflict,
                         // remove the peers and attempt to move them to the
                         // conflicting pool.