diff --git a/src/main/java/armameeldoparti/utils/mixers/BySkillPointsMixer.java b/src/main/java/armameeldoparti/utils/mixers/BySkillPointsMixer.java
index c73fdfa..060ab94 100644
--- a/src/main/java/armameeldoparti/utils/mixers/BySkillPointsMixer.java
+++ b/src/main/java/armameeldoparti/utils/mixers/BySkillPointsMixer.java
@@ -60,7 +60,7 @@ public List<Team> withoutAnchorages(List<Team> teams) {
     Map<Position, List<Player>> playersMap = CommonFields.getPlayersSets();
 
     for (Position position : Position.values()) {
-      List<Player> currentPlayersSet = playersMap.get(position);
+      List<Player> currentPlayersSet = new ArrayList<>(playersMap.get(position));
 
       // Players sorted highest to lowest
       currentPlayersSet.sort(comparingInt(Player::getSkillPoints).reversed());
diff --git a/src/main/java/armameeldoparti/utils/mixers/RandomMixer.java b/src/main/java/armameeldoparti/utils/mixers/RandomMixer.java
index 68b1780..55fe6e1 100644
--- a/src/main/java/armameeldoparti/utils/mixers/RandomMixer.java
+++ b/src/main/java/armameeldoparti/utils/mixers/RandomMixer.java
@@ -7,6 +7,7 @@
 import armameeldoparti.utils.common.CommonFields;
 import armameeldoparti.utils.common.CommonFunctions;
 import armameeldoparti.utils.common.Constants;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -63,7 +64,7 @@ public List<Team> withoutAnchorages(List<Team> teams) {
                                                              .getTeamPlayers();
 
     for (Position position : Position.values()) {
-      List<Player> playersAtPosition = playersSets.get(position);
+      List<Player> playersAtPosition = new ArrayList<>(playersSets.get(position));
 
       Collections.shuffle(playersAtPosition);