diff --git a/server/src/controllers/createLogEntry.controllers.ts b/server/src/controllers/createLogEntry.controllers.ts
index 2ebb3e055307d003747478cf44e9afe45a6633c5..b16a20dd4cfa8f68f5e2158d205f94e089085267 100644
--- a/server/src/controllers/createLogEntry.controllers.ts
+++ b/server/src/controllers/createLogEntry.controllers.ts
@@ -6,7 +6,6 @@ import BoatType from "../db/models/BoatType";
 //create log entry
 const createLogEntryController = async (req: Request, res: Response) => {
   try {
-
     //get input
     const logEntryInput = req.body;
 
@@ -31,27 +30,27 @@ const createLogEntryController = async (req: Request, res: Response) => {
     //check if number of additional clientsNames == given num of all clients - 1 (without responsible client)
     const numOfAdditionalClients = logEntryInput.additionalClients.length;
     const numP = logEntryInput.numP;
-    
-    if (numOfAdditionalClients !== numP-1) { //-1 because of the responsible Person
+
+    if (numOfAdditionalClients !== numP - 1) {
+      //-1 because of the responsible Person
       return res.status(404).json({
         success: false,
         error: "numberOfAllGivenClientsNamesDoesNotMatchNumberOfAllClients",
       });
     }
-    
+
     //check of numOfAllClients >= minP && numOfAllClients <= maxP
     const minP = chosenBoat.minP;
     const maxP = chosenBoat.maxP;
 
-    if (logEntryInput.numP >= minP && logEntryInput.numP <= maxP) { 
+    if (!(logEntryInput.numP >= minP && logEntryInput.numP <= maxP)) {
       return res.status(404).json({
         success: false,
-        error: "numberOfAllGivenClientsDoesNotMatchRequirementsOfChosenBoat",
+        error:
+          "numberOfAllGivenClientsDoesNotMatchRequirementsOfChosenBoatSeatNumber",
       });
     }
 
-
-
     //create entry
     const newLogEntry = await CheckIn.create(logEntryInput);
 
diff --git a/server/src/db/models/CheckIn.ts b/server/src/db/models/CheckIn.ts
index d27f78774819129470f4b8284410111144469dd9..e6423376ece96f7211c80cb59f745649532d0202 100644
--- a/server/src/db/models/CheckIn.ts
+++ b/server/src/db/models/CheckIn.ts
@@ -55,7 +55,8 @@ export const initCheckIn = async (sequelizeConnection: Sequelize) => {
       },
       date: {
         type: DataTypes.DATE,
-        allowNull: false,
+        // allowNull = true in order for the http request CheckIn to work, maybe needs to be entered/calculated automatically
+        allowNull: true,
       },
       destination: {
         type: DataTypes.STRING(),
@@ -89,11 +90,13 @@ export const initCheckIn = async (sequelizeConnection: Sequelize) => {
       },
       bookingType: {
         type: DataTypes.STRING(),
-        allowNull: false,
+        // allowNull = true in order for the http request CheckIn to work
+        allowNull: true,
       },
       returned: {
         type: DataTypes.BOOLEAN,
-        allowNull: false,
+        // allowNull = true in order for the http request CheckIn to work
+        allowNull: true,
       },
       note: {
         type: DataTypes.STRING(),
diff --git a/server/src/routes/createLogEntry.routes.ts b/server/src/routes/createLogEntry.routes.ts
index ee8d60b672e0a1b2723133bfc8af7f781650f983..037bcdcef71f98350642a19efc87ccb65d84bb89 100644
--- a/server/src/routes/createLogEntry.routes.ts
+++ b/server/src/routes/createLogEntry.routes.ts
@@ -16,10 +16,10 @@ entryRouter.post(
   body("fullNameOfResponsibleClient").not().isEmpty(),
   body("boatId").isUUID(),
   body("additionalClients").if(body("additionalClients").exists()).isArray(),
-  body("totalNumberOfClients").isInt(),
+  body("numP").isInt(),
   body("note").if(body("note").exists()).isString(),
   handleValidationResult,
   createLogEntryController
 );
 
-export default entryRouter;
+export default entryRouter;
\ No newline at end of file