When was experssed that shells around a nebulae (such as ngc6543) are a rare phenomen?

I want know in whitch year that the wrong result was experssed?

When was experssed that shells around a nebulae (such as ngc6543) are a rare phenomen?
The Cat's Eye Nebula, NGC6543, was discovered by William Herschel on February 15, 1786, and was the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins in 1864.



Thus, 1864 was the year of the first "wrong" theory.