diff --git a/IRaCIS.Core.Domain/Trial/Trial.cs b/IRaCIS.Core.Domain/Trial/Trial.cs
index d4b248288..cfcfc043a 100644
--- a/IRaCIS.Core.Domain/Trial/Trial.cs
+++ b/IRaCIS.Core.Domain/Trial/Trial.cs
@@ -262,7 +262,7 @@ public partial class Trial : BaseFullDeleteAuditEntity
 
     [Comment("项目术语配置Json字符串")]
     [StringLength(2000)]
-    public List<TrialObjectNameConfig> TrialObjectNameList { get; set; }
+    public List<TrialObjectNameConfig> TrialObjectNameList { get; set; } = new List<TrialObjectNameConfig>();
 
     //[NotMapped]
     //public List<TrialObjectNameConfig> TrialObjectNameList => JsonConvert.DeserializeObject<List<TrialObjectNameConfig>>(TrialObjectNameConfigStr) ?? new List<TrialObjectNameConfig>();
diff --git a/IRaCIS.Core.Infra.EFCore/Context/IRaCISDBContext.cs b/IRaCIS.Core.Infra.EFCore/Context/IRaCISDBContext.cs
index 2349455d9..6b08d00de 100644
--- a/IRaCIS.Core.Infra.EFCore/Context/IRaCISDBContext.cs
+++ b/IRaCIS.Core.Infra.EFCore/Context/IRaCISDBContext.cs
@@ -71,7 +71,7 @@ public class IRaCISDBContext : DbContext
 
         modelBuilder.Entity<Trial>(entity =>
         {
-            entity.Property(e => e.TrialObjectNameList).HasConversion(v => v == null ? "[]" : JsonConvert.SerializeObject(v),
+            entity.Property(e => e.TrialObjectNameList).HasConversion(v => v == null ||v.Count==0 ? "[]" : JsonConvert.SerializeObject(v),
                 v => string.IsNullOrEmpty(v) ? new List<TrialObjectNameConfig>() : JsonConvert.DeserializeObject<List<TrialObjectNameConfig>>(v));
         });