diff --git a/AsbCloudInfrastructure/Services/WellService.cs b/AsbCloudInfrastructure/Services/WellService.cs
index 7645c0aa..d55bd2a5 100644
--- a/AsbCloudInfrastructure/Services/WellService.cs
+++ b/AsbCloudInfrastructure/Services/WellService.cs
@@ -126,8 +126,11 @@ namespace AsbCloudInfrastructure.Services
             return wells;
         }
 
-        public override async Task<int> InsertAsync(WellDto dto, CancellationToken token = default)
+        public override async Task<int> InsertAsync(WellDto dto, CancellationToken token)
         {
+            if (IsTelemetryAssignedToDifferentWell(dto))
+                throw new ArgumentInvalidException("Телеметрия уже была привязана к другой скважине.", nameof(dto));
+            
             if (dto.IdWellType is < 1 or > 2)
                 throw new ArgumentInvalidException("Тип скважины указан неправильно.", nameof(dto));
 
@@ -157,9 +160,12 @@ namespace AsbCloudInfrastructure.Services
             throw new NotImplementedException();
         }
 
-        public override async Task<int> UpdateAsync(WellDto dto,
-            CancellationToken token = default)
+        public override async Task<int> UpdateAsync(WellDto dto, 
+            CancellationToken token)
         {
+            if (IsTelemetryAssignedToDifferentWell(dto))
+                throw new ArgumentInvalidException("Телеметрия уже была привязана к другой скважине.", nameof(dto));
+            
             if (dto.IdWellType is < 1 or > 2)
                 throw new ArgumentInvalidException("Тип скважины указан неправильно.", nameof(dto));
 
@@ -335,6 +341,20 @@ namespace AsbCloudInfrastructure.Services
             throw new Exception($"Can't find timezone for well {wellDto.Caption} id: {wellDto.Id}");
         }
 
+        private bool IsTelemetryAssignedToDifferentWell(WellDto wellDto)
+        {
+            if (!wellDto.IdTelemetry.HasValue)
+                return false;
+
+            var existingWellWithAssignedTelemetry = GetCache()
+                .FirstOrDefault(x => x.IdTelemetry == wellDto.IdTelemetry);
+
+            if (existingWellWithAssignedTelemetry is null)
+                return false;
+            
+            return existingWellWithAssignedTelemetry.Id != wellDto.Id;
+        }
+
         private static AsbCloudDb.Model.IMapPoint GetCoordinates(Well well)
         {
             if (well is null)