diff --git a/src/world/World.php b/src/world/World.php
index 9be1d06e4..49c6686ee 100644
--- a/src/world/World.php
+++ b/src/world/World.php
@@ -3043,9 +3043,14 @@ class World implements ChunkManager{
 			unset($this->activeChunkPopulationTasks[$index]);
 
 			if($dirtyChunks === 0){
-				$promise = $this->chunkPopulationRequestMap[$index];
-				unset($this->chunkPopulationRequestMap[$index]);
-				$promise->resolve($chunk);
+				$promise = $this->chunkPopulationRequestMap[$index] ?? null;
+				if($promise !== null){
+					unset($this->chunkPopulationRequestMap[$index]);
+					$promise->resolve($chunk);
+				}else{
+					//Handlers of ChunkPopulateEvent, ChunkLoadEvent, or just ChunkListeners can cause this
+					$this->logger->debug("Unable to resolve population promise for chunk x=$x,z=$z - populated chunk was forcibly unloaded while setting modified chunks");
+				}
 			}else{
 				//request failed, stick it back on the queue
 				//we didn't resolve the promise or touch it in any way, so any fake chunk loaders are still valid and