I have problems with the multiple selection dropdown and graphics

Your comment was of great help to me, thank you, I was able to solve the problem by changing the code in the parts that you recommended, something like this was left.

app = dash.Dash(__name__)

app.layout = html.Div(children=[
    html.H1(children='Analisis de reingresos'),
    html.Div([
        
        
        
        html.Div(children=[
        html.Label('Seleccione Motivo'),
        dcc.Dropdown(
            id='dropdown',
            #options=[{'label': i, 'value': i} for i in options],
            options=[{'label':h, 'value':h} for h in aaa6['Motivo'].unique()],
            searchable=True,
            value='NA',
            multi=True
        )],style={'width': '25%', 'display': 'inline-block'}),
        
        
        
        
        
        html.Div(children=[
        html.Label('Seleccione tipo de personal'),
        dcc.Dropdown(
            id='dropdowntp',
            #options=[{'label': i, 'value': i} for i in options],
            options=[{'label':h, 'value':h} for h in aaa6['Tipopersonal'].unique()],
            value='NA',
            multi=True,
            searchable=True
         )], style={'width': '25%', 'display': 'inline-block'}),
        
        
        
        
        html.Div(children=[
        html.Label('Seleccione Centro de Costo'),
        dcc.Dropdown(
            id='dropdowncc',
            #options=[{'label': i, 'value': i} for i in options],
            options=[{'label':c, 'value':c} for c in aaa6['Ncc'].unique()],
            value='NA',
            multi=True
         )], style={'width': '25%', 'display': 'inline-block'}),

        
        
        
        
        html.Div(children=[
        html.Label('Seleccione bodega'),
        dcc.Dropdown(
            id='dropdownb',
            #options=[{'label': i, 'value': i} for i in options],
            options=[{'label':c, 'value':c} for c in aaa6['Nombre Bodega'].unique()],
            value='NA',
            multi=True
         )], style={'width': '25%', 'display': 'inline-block'}),
        


        
        
        
       html.Div(dcc.Graph(id='graph')),
    ]),
])


@app.callback(
   Output('graph', 'figure'),
   Input('dropdown','value'),
    Input('dropdowntp','value'),
    Input('dropdowncc','value'),
    Input('dropdownb','value'),
   
)
def update_graph(dropdown,dropdowntp,dropdowncc,dropdownb):
    dff = aaa6.copy()
    
    #motivo de reingreso
    if not dropdown or 'NA' in dropdown :
        dff['Motivo'] = aaa6['Motivo']
    else:
        
        if dropdown != "NA":
            dff = dff[dff['Motivo'].isin(dropdown)]
            
            
            
            
            
    #tipo de personal        
    if not dropdowntp or 'NA' in dropdowntp:
        dff['Tipopersonal'] = aaa6['Tipopersonal']
    else:
        
                  
        if dropdowntp != "NA":
            dff = dff[dff['Tipopersonal'].isin(dropdowntp)]
          
        
        
            
            
            
    #centro de costo         
    if not dropdowncc or 'NA' in dropdowncc:
        dff['Ncc'] = aaa6['Ncc']
    else:
        
                  
        if dropdowncc != "NA":
            dff = dff[dff['Ncc'].isin(dropdowncc)]
     
    
    
    
    

    #bodega         
    if not dropdownb or 'NA' in dropdownb:
        dff['Nombre Bodega'] = aaa6['Nombre Bodega']
    else:
        
                  
        if dropdownb != "NA":
            dff = dff[dff['Nombre Bodega'].isin(dropdownb)]
                    


        
    

    figure222=px.bar(dff, x="Motivo", y="cantidadreingresada", color="Motivo", title='Personal que mas reingresa')

    return figure222


if __name__ == '__main__':
    app.run_server(debug=False, port=8000)