I am trying to copy an attachment from one account to the other in Apex Code and receive the following compilation error: "Data type not supported".

I highlighted the line of code that generated the error. It lookslike Apex Code does not support the .Body datatype. Is there anyway to insert an Attachment in Apex?

Here is the snippet of my code:

Code:

for (Attachment attachmentSource : [Select Body, ContentType, IsPrivate, Name from Attachment where ParentId = :a.Clone_From_ID__c])
{
 Attachment attachmentTarget = new Attachment();
   
       
 attachmentTarget.ParentId = a.Id;
        attachmentTarget.OwnerId = a.OwnerId;  //assign same owner as parent account
     
 attachmentTarget.Body = attachmentSource.Body;
 attachmentTarget.ContentType = attachmentSource.ContentType; 
 attachmentTarget.IsPrivate = attachmentSource.IsPrivate;
 attachmentTarget.Name = attachmentSource.Name;
     
 insert(attachmentTarget); 
}