diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/BackupCleaner.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/BackupCleaner.java
index 4d42ccb..e4b2203 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/BackupCleaner.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/BackupCleaner.java
@@ -2,6 +2,7 @@ package fr.pandacube.lib.paper.modules.backup;
 
 import java.io.File;
 import java.time.LocalDateTime;
+import java.time.format.DateTimeParseException;
 import java.util.Map.Entry;
 import java.util.Optional;
 import java.util.TreeMap;
@@ -80,7 +81,13 @@ public abstract class BackupCleaner implements UnaryOperator<TreeSet<LocalDateTi
             }
 
             String dateTimeStr = filename.substring(0, filename.length() - 4);
-            LocalDateTime ldt = LocalDateTime.parse(dateTimeStr, CompressProcess.dateFileNameFormatter);
+            LocalDateTime ldt;
+            try {
+                ldt = LocalDateTime.parse(dateTimeStr, CompressProcess.dateFileNameFormatter);
+            } catch (DateTimeParseException e) {
+                Log.warning("Unable to parse file name to a date-time: " + file, e);
+                continue;
+            }
 
             datedFiles.put(ldt, file);
         }
diff --git a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/CompressProcess.java b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/CompressProcess.java
index c28b1d0..5f8d5db 100644
--- a/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/CompressProcess.java
+++ b/pandalib-paper/src/main/java/fr/pandacube/lib/paper/modules/backup/CompressProcess.java
@@ -18,7 +18,6 @@ import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeFormatterBuilder;
 import java.time.temporal.ChronoField;
-import java.util.Calendar;
 import java.util.Date;
 import java.util.function.BiPredicate;
 
@@ -153,9 +152,11 @@ public abstract class CompressProcess implements Comparable<CompressProcess>, Ru
 	
 	
 	static DateTimeFormatter dateFileNameFormatter = new DateTimeFormatterBuilder()
-			.append(DateTimeFormatter.BASIC_ISO_DATE)
+			.appendValue(ChronoField.YEAR, 4)
+			.appendValue(ChronoField.MONTH_OF_YEAR, 2)
+			.appendValue(ChronoField.DAY_OF_MONTH, 2)
 			.appendLiteral('-')
-			.appendValue(ChronoField.HOUR_OF_DAY, 2) // there is no DateTimeFormatter.BASIC_ISO_TIME
+			.appendValue(ChronoField.HOUR_OF_DAY, 2)
 			.appendValue(ChronoField.MINUTE_OF_HOUR, 2)
 			.appendValue(ChronoField.SECOND_OF_MINUTE, 2)
 			.toFormatter();