diff --git a/client/src/schemas/importdata.schema.json b/client/src/schemas/importdata.schema.json
index 7790f3b2..bfb1943a 100644
--- a/client/src/schemas/importdata.schema.json
+++ b/client/src/schemas/importdata.schema.json
@@ -367,7 +367,55 @@
                     }
                 },
                 "type": "object",
-                "required": ["activePath","alive","ammo","category","categoryDisplayName","coalition","contacts","controlled","country","desiredAltitude","desiredAltitudeType","desiredSpeed","desiredSpeedType","emissionsCountermeasures","followRoads","formationOffset","fuel","generalSettings","groupName","hasTask","heading","health","horizontalVelocity","human","ID","isActiveAWACS","isActiveTanker","isLeader","leaderID","name","onOff","operateAs","position","radio","reactionToThreat","ROE","shotsIntensity","shotsScatter","speed","state","TACAN","targetID","targetPosition","task","track","unitName","verticalVelocity"]
+                "required": [
+                    "activePath",
+                    "alive",
+                    "ammo",
+                    "category",
+                    "categoryDisplayName",
+                    "coalition",
+                    "contacts",
+                    "controlled",
+                    "country",
+                    "desiredAltitude",
+                    "desiredAltitudeType",
+                    "desiredSpeed",
+                    "desiredSpeedType",
+                    "emissionsCountermeasures",
+                    "followRoads",
+                    "formationOffset",
+                    "fuel",
+                    "generalSettings",
+                    "groupName",
+                    "hasTask",
+                    "heading",
+                    "health",
+                    "horizontalVelocity",
+                    "human",
+                    "ID",
+                    "isActiveAWACS",
+                    "isActiveTanker",
+                    "isLeader",
+                    "leaderID",
+                    "name",
+                    "onOff",
+                    "operateAs",
+                    "position",
+                    "radio",
+                    "reactionToThreat",
+                    "ROE",
+                    "shotsIntensity",
+                    "shotsScatter",
+                    "speed",
+                    "state",
+                    "TACAN",
+                    "targetID",
+                    "targetPosition",
+                    "task",
+                    "track",
+                    "unitName",
+                    "verticalVelocity"
+                ]
             },
             "minItems": 1,
             "type": "array"
diff --git a/client/src/unit/importexport/unitdatafileimport.ts b/client/src/unit/importexport/unitdatafileimport.ts
index 9907f6f2..6cebeef9 100644
--- a/client/src/unit/importexport/unitdatafileimport.ts
+++ b/client/src/unit/importexport/unitdatafileimport.ts
@@ -68,7 +68,13 @@ export class UnitDataFileImport extends UnitDataFile {
                     const validator = new ImportFileJSONSchemaValidator();
                     if (!validator.validate(this.#fileData)) {
                         const errors = validator.getErrors().reduce((acc:any, error:any) => {
-                            acc.push(error.instancePath + ": " + error.message)
+                            let errorString = error.instancePath.substring(1) + ": " + error.message;
+                            if (error.params) {
+                                const {allowedValues} = error.params;
+                                if (allowedValues)
+                                    errorString += ": " + allowedValues.join(', ');
+                            }
+                            acc.push(errorString);
                             return acc;
                         }, [] as string[]);
                         this.#showFileDataErrors(errors);