diff --git a/common/src/main/java/ctbrec/Config.java b/common/src/main/java/ctbrec/Config.java
index 4e637ad9..f2b18823 100644
--- a/common/src/main/java/ctbrec/Config.java
+++ b/common/src/main/java/ctbrec/Config.java
@@ -20,6 +20,7 @@ import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import java.time.format.FormatStyle;
 import java.util.*;
+import java.util.regex.Pattern;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.nio.file.StandardOpenOption.*;
@@ -86,7 +87,7 @@ public class Config {
 
     private void deleteOldBackups(File currentConfigDir) {
         File parent = currentConfigDir.getParentFile();
-        File[] backupDirectories = parent.listFiles(file -> file.isDirectory() && file.getName().matches(".*?_backup_\\d{4}-\\d{2}-\\d{2}_\\d{2}-\\d{2}-\\d{2}_\\d{3}"));
+        File[] backupDirectories = parent.listFiles(file -> file.isDirectory() && file.getName().matches(Pattern.quote(currentConfigDir.getName()) + "_backup_\\d{4}-\\d{2}-\\d{2}_\\d{2}-\\d{2}-\\d{2}_\\d{3}"));
         Arrays.sort(backupDirectories, Comparator.comparing(File::getName));
         for (int i = 0; i < backupDirectories.length - 5; i++) {
             File dirToDelete = backupDirectories[i];