counter: update delete Command conflict

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CREATE TABLE expendbulk (
key text,
expend counter,
PRIMARY KEY (key)
);
--------------------------------------------------------
2. insert data:
cqlsh:lottery> UPDATE expendbulk SET expend = expend + 1 WHERE key = 'TJ';
cqlsh:lottery> SELECT * FROM expendbulk ;

key | expend
----+-------
TJ | 1
-----------------------------------------------------------------------------------------
3.delete data:
cqlsh:lottery> DELETE from expendbulk where key = 'TJ';
cqlsh:lottery> SELECT * FROM expendbulk ;

(0 rows)
----------------------------------------------------------------------------------
4.insert data:
cqlsh:lottery> UPDATE expendbulk SET expend = expend + 1 WHERE key = 'TJ';
cqlsh:lottery> SELECT * FROM expendbulk ;

(0 rows)
----------------------------------------------------------------------------------------

After deleting the data can not be inserted.