unable to control the optimization of some hyperparameters

I'm trying to optimize the hyperparmeters (number of layers and number of nodes in each layer) for a Stacked auto encoder as follows:

optimVars = [optimizableVariable('numLayers',[1 3],'Type','integer') % number of layers
    optimizableVariable('layer1_Size',[500 1000],'Type','integer') % number of nodes in the first layer
    optimizableVariable('layer2_Size',[500 400],'Type','integer') % number of nodes in the 2nd layer
    optimizableVariable('layer3_Size',[400 50],'Type','integer') % number of nodes in the 3rd layer
    
    
    ];

but this way I'm facing a problem which is for example: when the optimizer runs an iteration with numbLayers=1, the

optimzer will optimize the last two variables (layer2_Size & layer3_Size) which in such a case are not needed to optimize because

the only variable needs to be optimized in this case is "layer1_Size" . Is there any way to solve this problem by setting a variable on/off depending on another variable value?