BK conditions are not satisfied: no stable equilibrium

Hello everyone. I got stuck in this error for a few days. I have searched the forum and seen some possible solutions. I think there is no timing problem and redundant equations.

Error using print_info (line 42)
Blanchard Kahn conditions are not satisfied: no stable equilibrium
Error in stoch_simul (line 100)
print_info(info, options_.noprint, options_);
Error in c (line 371)
info = stoch_simul(var_list_);
Error in dynare (line 235)
evalin(‘base’,fname) ;

And the model diagnostics is as follow. Thanks in advance for any advice!

model_diagnostics(M_,options_,oo_)
MODEL_DIAGNOSTICS: The Jacobian of the static model is singular
MODEL_DIAGNOSTICS: there is 1 colinear relationships between the variables and the equations
Colinear variables:
y
yj
yf
m
x
c
l
b
bf
q
ca
lamda
gdp
Colinear equations
4 9 19 21
MODEL_DIAGNOSTICS: The singularity seems to be (partly) caused by the presence of a unit root
MODEL_DIAGNOSTICS: as the absolute value of one eigenvalue is in the range of ±1e-6 to 1.
MODEL_DIAGNOSTICS: If the model is actually supposed to feature unit root behavior, such a warning is expected,
MODEL_DIAGNOSTICS: but you should nevertheless check whether there is an additional singularity problem.
MODEL_DIAGNOSTICS: The presence of a singularity problem typically indicates that there is one
MODEL_DIAGNOSTICS: redundant equation entered in the model block, while another non-redundant equation
MODEL_DIAGNOSTICS: is missing. The problem often derives from Walras Law.

EIGENVALUES:
Modulus Real Imaginary

   4.989e-15        4.989e-15                0
      0.4905           0.4905                0
         0.5              0.5                0
        0.95             0.95                0
        0.98             0.98                0
           1                1                0
        1.01             1.01                0
       1.012            1.012                0
       1.013            1.013                0
       1.627            1.627                0

There are 4 eigenvalue(s) larger than 1 in modulus for 2 forward-looking variable(s)
The rank condition ISN’T verified!

calib.m (817 Bytes)
c.mod (2.8 KB)

Your model has a unit root and an instability issue. What in your model makes sure that debt does not explode?