Reproducing Steps:

1. open zss.test/display2003.zul
2. goto sheet ""row"", delete first row.
3. insert a row on row 1

What I see:
A JavaScript error is thrown.

Failed to process
setAttr
Cannot read property 'index' of undefined

However, column doesn't happen this issue.

min. reproducing steps

1. open a blank xls or xlsx file
2. change row 2's height
3. freez one row
4. remove row 1
5. insert a row on row 1
6. (if xlsx) change row 1's height

operate on columns has same issue.