diff --git a/bin/compose-core b/bin/compose-core
index 7558b22..9a7eabf 100755
--- a/bin/compose-core
+++ b/bin/compose-core
@@ -722,7 +722,7 @@ export -f set_db_params
 
 export _PID="$$"
 ensure_db_docker_running () {
-    local _STATE_FILE errlvl
+    local _STATE_FILE errlvl project
 
     _DB_NAME="db_${DB_NAME}_${_PID}"
     _STATE_FILE="$state_tmpdir/${_DB_NAME}.state"
@@ -761,6 +761,11 @@ ensure_db_docker_running () {
                        --format "{{range .Mounts}}{{if eq .Destination \"$DB_DATADIR\"}}{{.Source}}{{end}}{{end}}" \
                        "$docker_id")
             if [ "$has_volume_mounted" == "$host_db_working_dir" ]; then
+                info "docker '$docker_id' uses '$has_volume_mounted'."
+                project=$(docker inspect "$docker_id" \
+                                 --format "{{index .Config.Labels \"compose.project\" }}") || continue
+                info "docker '$docker_id' is from project '$project' (current project is '$PROJECT_NAME')."
+                [ "$project" == "$PROJECT_NAME" ] || continue
                 found="$docker_id"
                 break
             fi