diff --git a/buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java b/buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java
index 5e2e095..0f9f033 100755
--- a/buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/configutils/FileToDatabaseMigrator.java
@@ -32,6 +32,9 @@ public class FileToDatabaseMigrator {
     private static final String ROOM_STRING = "sala";
     private static final String CAPACITY_STRING = "Mc";
 
+    private static final String ZAJ_CYK_ID = "zaj_cyk_id";
+    private static final String GR_NR = "gr_nr";
+
     @Autowired
     private LecturerService lecturerService;
     @Autowired
@@ -56,6 +59,9 @@ public class FileToDatabaseMigrator {
         int roomIndex = data.getIndexOf(FileToDatabaseMigrator.ROOM_STRING);
         int capacityIndex = data.getIndexOf(FileToDatabaseMigrator.CAPACITY_STRING);
 
+        int zajCykIdIndex = data.getIndexOf(FileToDatabaseMigrator.ZAJ_CYK_ID);
+        int grNrIndex = data.getIndexOf(FileToDatabaseMigrator.GR_NR);
+
         while (rows.hasNext()) {
             Row row = rows.next();
 
@@ -67,6 +73,12 @@ public class FileToDatabaseMigrator {
             String lecturerSurname = row.getCell(surnameIndex) != null ? row.getCell(surnameIndex).toString().trim()
                     : "";
 
+            Integer zajCykId = row.getCell(zajCykIdIndex) != null ? (int) Double.parseDouble(row.getCell(zajCykIdIndex).toString().trim())
+                    : null;
+            
+            Integer grNr = row.getCell(grNrIndex) != null ? (int) Double.parseDouble(row.getCell(grNrIndex).toString().trim())
+                    : null;
+
             int day = (int) Double.parseDouble(row.getCell(dayIndex).toString());
             WeekDay groupDay = WeekDay.getDay(day - 1);
             int time = parseTimeToInt(row.getCell(timeIndex).toString());
@@ -80,8 +92,8 @@ public class FileToDatabaseMigrator {
                     .orElseGet(() -> this.lecturerService
                             .save(new Lecturer(lecturerTitle, lecturerName, lecturerSurname)));
 
-            this.groupService.find(time, capacity, room).orElseGet(
-                    () -> this.groupService.save(new Groups(capacity, room, course, time, groupDay, lecturer)));
+            this.groupService.find(zajCykId, grNr).orElseGet(
+                    () -> this.groupService.save(new Groups(capacity, room, course, time, groupDay, lecturer, zajCykId, grNr)));
 
         }
 
diff --git a/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java b/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
index 725d126..c6bbf4e 100755
--- a/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/entities/Groups.java
@@ -34,26 +34,26 @@ public class Groups {
     @ManyToOne
     @JoinColumn(name = "lecturer_id")
     private Lecturer lecturer;
-    private String zaj_cyk_id;
-    private String gr_nr;
+    private Integer zajCykId;
+    private Integer grNr;
 
     public Groups() {
     }
 
-    public String getGr_nr() {
-        return gr_nr;
+    public Integer getGr_nr() {
+        return grNr;
     }
 
-    public void setGr_nr(String gr_nr) {
-        this.gr_nr = gr_nr;
+    public void setGr_nr(Integer grNr) {
+        this.grNr = grNr;
     }
 
-    public String getZaj_cyk_id() {
-        return zaj_cyk_id;
+    public Integer getZaj_cyk_id() {
+        return zajCykId;
     }
 
-    public void setZaj_cyk_id(String zaj_cyk_id) {
-        this.zaj_cyk_id = zaj_cyk_id;
+    public void setZaj_cyk_id(Integer zajCykId) {
+        this.zajCykId = zajCykId;
     }
 
 
@@ -89,13 +89,13 @@ public class Groups {
      * @param endTime  end time of class in minutes
      * @param day      day given to the groups
      * @param lecturer lecturer given to the groups
-     * @param zaj_cyk_id number of class in the term
+     * @param zajCykId number of class in the term
      * @param gr_nr Number of class/course
      */
-    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer, String zaj_cyk_id, String gr_nr) {
+    public Groups(int capacity, String room, Course course, int time, int endTime, WeekDay day, Lecturer lecturer, Integer zajCykId, Integer grNr) {
         this(capacity, room, course, time, endTime, day, lecturer);
-        this.zaj_cyk_id = zaj_cyk_id;
-        this.gr_nr = gr_nr;
+        this.zajCykId = zajCykId;
+        this.grNr = grNr;
     }
 
     /**
@@ -107,13 +107,13 @@ public class Groups {
      * @param time     time given to the groups
      * @param day      day given to the groups
      * @param lecturer lecturer given to the groups
-     * @param zaj_cyk_id number of class in the term
-     * @param gr_nr Number of class/course
+     * @param zajCykId number of class in the term
+     * @param grNr Number of class/course
      */
-    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer, String zaj_cyk_id, String gr_nr) {
+    public Groups(int capacity, String room, Course course, int time, WeekDay day, Lecturer lecturer, Integer zajCykId, Integer grNr) {
         this(capacity, room, course, time, time + DEFAULT_CLASS_TIME, day, lecturer);
-        this.zaj_cyk_id = zaj_cyk_id;
-        this.gr_nr = gr_nr;
+        this.zajCykId = zajCykId;
+        this.grNr = grNr;
     }
 
     /**
diff --git a/buisnesslogic/src/main/java/com/plannaplan/repositories/GroupRepository.java b/buisnesslogic/src/main/java/com/plannaplan/repositories/GroupRepository.java
index 019a6ad..4d20a56 100755
--- a/buisnesslogic/src/main/java/com/plannaplan/repositories/GroupRepository.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/repositories/GroupRepository.java
@@ -28,6 +28,9 @@ public interface GroupRepository extends JpaRepository<Groups, Long> {
     @Query("FROM Groups WHERE time = ?1 AND room = ?2 AND capacity = ?3")
     Optional<Groups> find(@Param("time") int time, @Param("room") String room, @Param("capacity") int capacity);
 
+    @Query("FROM Groups WHERE zajCykId = ?1 AND grNr = ?2")
+    Optional<Groups> find(@Param("zajCykId") Integer zaj_cyk_id, @Param("grNr") Integer gr_nr);
+
     @Query("FROM Groups WHERE course_id = ?1")
     List<Groups> getByCourse(@Param("id") Long id);
 
diff --git a/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java b/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
index 65ab5c8..c3e40ca 100755
--- a/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
+++ b/buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java
@@ -30,6 +30,10 @@ public class GroupService {
         return this.repo.find(time, room, capacity);
     }
 
+    public Optional<Groups> find(Integer zajCykId, Integer nrGr ) {
+        return this.repo.find(zajCykId, nrGr);
+    }
+
     public List<Groups> getGroupsByCourse(Long id) {
         return this.repo.getByCourse(id);
     }